Manage salt-minion package, service and config

Restart the service after upgrading the package or modifying the minion
configuration file.

Signed-off-by: Joe Groocock <me@frebib.net>

states/salt/minion/init.sls

@@ -10,10 +10,10 @@ salt-minion:
     - file: /etc/salt/minion
 
 restart-salt-minion:
-  cmd.run:
-  - name: "sleep 10 && systemctl restart salt-minion --no-block"
-  - bg: true
+  service.restart:
+  - name: salt-minion
   - order: last
+  - no_block: true
   - watch:
     - pkg: salt-minion
     - file: /etc/salt/minion