test(_mapdata): update verification files for `master_type: str`

Use the following command:

```
$ GREP_SED="^\(\s\+master_type: \)true" \
  && grep -rl "${GREP_SED}" test/integration/ \
  | xargs sed -i -e "/${GREP_SED}/s//\1str/"
```

test/integration/v3000-py2/files/_mapdata/ubuntu-16.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py2/files/_mapdata/ubuntu-18.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py3/files/_mapdata/amazonlinux-2.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py3/files/_mapdata/centos-7.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py3/files/_mapdata/centos-8.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py3/files/_mapdata/debian-10.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py3/files/_mapdata/debian-9.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py3/files/_mapdata/gentoo-2-sysd.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py3/files/_mapdata/gentoo-2-sysv.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py3/files/_mapdata/opensuse-15.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py3/files/_mapdata/oraclelinux-7.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py3/files/_mapdata/oraclelinux-8.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py3/files/_mapdata/ubuntu-16.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py3/files/_mapdata/ubuntu-18.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3000-py3/files/_mapdata/windows-2019-server.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - "/srv/pillar"

test/integration/v3001-py3/files/_mapdata/amazonlinux-2.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/centos-7.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/centos-8.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/debian-10.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/debian-9.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/fedora-32.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/fedora-33.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/gentoo-2-sysd.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/gentoo-2-sysv.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/openbsd-6.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/opensuse-15.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/opensuse-tumbleweed.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/oraclelinux-7.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/oraclelinux-8.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/ubuntu-16.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/ubuntu-18.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3001-py3/files/_mapdata/ubuntu-20.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/amazonlinux-2.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/arch-base-latest.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/centos-7.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/centos-8.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/debian-10.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/debian-9.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/fedora-32.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/fedora-33.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/fedora-34.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/freebsd-11.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/freebsd-12.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/freebsd-13.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/gentoo-2-sysd.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/gentoo-2-sysv.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/openbsd-6.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/opensuse-15.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/opensuse-tumbleweed.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/oraclelinux-7.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/oraclelinux-8.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/ubuntu-16.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/ubuntu-18.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/ubuntu-20.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3002-py3/files/_mapdata/windows-10.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - "/srv/pillar"

test/integration/v3002-py3/files/_mapdata/windows-2016-server.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - "/srv/pillar"

test/integration/v3002-py3/files/_mapdata/windows-2019-server.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - "/srv/pillar"

test/integration/v3002-py3/files/_mapdata/windows-8.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - "/srv/pillar"

test/integration/v3003-py3/files/_mapdata/almalinux-8.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/amazonlinux-2.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/arch-base-latest.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/centos-7.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/centos-8.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/debian-10.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/debian-9.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/fedora-32.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/fedora-33.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/fedora-34.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/freebsd-11.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/freebsd-12.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/freebsd-13.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/gentoo-2-sysd.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/gentoo-2-sysv.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/opensuse-15.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/opensuse-tumbleweed.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/oraclelinux-7.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/oraclelinux-8.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/ubuntu-18.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/ubuntu-20.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - /srv/pillar

test/integration/v3003-py3/files/_mapdata/windows-10.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - "/srv/pillar"

test/integration/v3003-py3/files/_mapdata/windows-2016-server.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - "/srv/pillar"

test/integration/v3003-py3/files/_mapdata/windows-2019-server.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - "/srv/pillar"

test/integration/v3003-py3/files/_mapdata/windows-8.yaml

       fileserver_backend:
       - rootfs
       master: localhost
-      master_type: true
+      master_type: str
       pillar_roots:
         base:
         - "/srv/pillar"