match hostname in Open_vSwitch table

linux/files/openvswitch-switch.systemd

+[Unit]
+Description=Open vSwitch
+Before=network.target
+After=network-pre.target ovsdb-server.service ovs-vswitchd.service
+PartOf=network.target
+Requires=ovsdb-server.service
+Requires=ovs-vswitchd.service
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/ovs-vsctl set open . external-ids:hostname=%H
+ExecReload=/bin/true
+ExecStop=/bin/true
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target
+

linux/network/openvswitch.sls

     - require:
       - pkg: openvswitch_pkgs
 
+/etc/systemd/system/openvswitch-switch.service:
+  file.managed:
+    - source: salt://linux/files/openvswitch-switch.systemd
+    - template: jinja
+    - require:
+      - pkg: openvswitch_pkgs
+  module.run:
+    - name: service.systemctl_reload
+    - onchanges:
+      - file: /etc/systemd/system/openvswitch-switch.service
+
 openvswitch_switch_service:
   service.running:
     - name: openvswitch-switch