Restart openshift master services after stack update

For some configs changes, such as the identity providers, it is
necessary to restart the master services in order for them to take
effect.

Change-Id: I6ecb054d0e18acc4dc422a7ce136432d5135c64c
Closes-Bug: #1807668

extraconfig/services/openshift-master.yaml

@@ -371,6 +371,13 @@ outputs:
                       # Re-run the deploy playbook to apply potential change
                       # changes to existing nodes
                       - include: "{{openshift_ansible_playbook_path}}"
+                      - name: Restart masters
+                        hosts: masters
+                        serial: 1
+                        tasks:
+                        - import_role:
+                            name: /usr/share/ansible/openshift-ansible/roles/openshift_control_plane
+                            tasks_from: restart.yml
                       {% endif %}
 
                 - name: set openshift command