openshift-master/restart : use openshift.common.hostname instead of inventory_hostname

When using a dynamic inventory inventory_hostname isn't guaranteed to be usable.  We should use openshift.common.hostname which
already copes with this

playbooks/common/openshift-master/restart_hosts.yml

@@ -11,7 +11,7 @@
   become: no
   local_action:
     module: wait_for
-      host="{{ inventory_hostname }}"
+      host="{{ openshift.common.hostname }}"
       state=started
       delay=10
       port="{{ openshift.master.api_port }}"

playbooks/common/openshift-master/restart_services.yml

@@ -12,7 +12,7 @@
   become: no
   local_action:
     module: wait_for
-      host="{{ inventory_hostname }}"
+      host="{{ openshift.common.hostname }}"
       state=started
       delay=10
       port="{{ openshift.master.api_port }}"