ci(kitchen): use `saltimages` Docker Hub where available [skip ci]

* Automated using https://github.com/myii/ssf-formula/pull/223

kitchen.yml

@@ -14,16 +14,16 @@ platforms:
   ## SALT `master`
   - name: debian-10-master-py3
     driver:
-      image: netmanagers/salt-master-py3:debian-10
+      image: saltimages/salt-master-py3:debian-10
   - name: ubuntu-1804-master-py3
     driver:
-      image: netmanagers/salt-master-py3:ubuntu-18.04
+      image: saltimages/salt-master-py3:ubuntu-18.04
   - name: centos-8-master-py3
     driver:
-      image: netmanagers/salt-master-py3:centos-8
+      image: saltimages/salt-master-py3:centos-8
   - name: fedora-31-master-py3
     driver:
-      image: netmanagers/salt-master-py3:fedora-31
+      image: saltimages/salt-master-py3:fedora-31
   - name: opensuse-leap-151-master-py3
     driver:
       image: netmanagers/salt-master-py3:opensuse-leap-15.1
@@ -34,24 +34,24 @@ platforms:
       max_ssh_sessions: 1
   - name: amazonlinux-2-master-py3
     driver:
-      image: netmanagers/salt-master-py3:amazonlinux-2
+      image: saltimages/salt-master-py3:amazonlinux-2
 
   ## SALT `2019.2`
   - name: debian-10-2019-2-py3
     driver:
-      image: netmanagers/salt-2019.2-py3:debian-10
+      image: saltimages/salt-2019.2-py3:debian-10
   - name: debian-9-2019-2-py3
     driver:
-      image: netmanagers/salt-2019.2-py3:debian-9
+      image: saltimages/salt-2019.2-py3:debian-9
   - name: ubuntu-1804-2019-2-py3
     driver:
-      image: netmanagers/salt-2019.2-py3:ubuntu-18.04
+      image: saltimages/salt-2019.2-py3:ubuntu-18.04
   - name: centos-8-2019-2-py3
     driver:
-      image: netmanagers/salt-2019.2-py3:centos-8
+      image: saltimages/salt-2019.2-py3:centos-8
   - name: fedora-31-2019-2-py3
     driver:
-      image: netmanagers/salt-2019.2-py3:fedora-31
+      image: saltimages/salt-2019.2-py3:fedora-31
   - name: opensuse-leap-151-2019-2-py3
     driver:
       image: netmanagers/salt-2019.2-py3:opensuse-leap-15.1
@@ -65,10 +65,10 @@ platforms:
       image: netmanagers/salt-2019.2-py2:centos-7
   - name: amazonlinux-2-2019-2-py3
     driver:
-      image: netmanagers/salt-2019.2-py3:amazonlinux-2
+      image: saltimages/salt-2019.2-py3:amazonlinux-2
   - name: arch-base-latest-2019-2-py2
     driver:
-      image: netmanagers/salt-2019.2-py2:arch-base-latest
+      image: saltimages/salt-2019.2-py2:arch-base-latest
       run_command: /usr/lib/systemd/systemd
 
   ## SALT `2018.3`