Don't restart docker when re-deploying node certificates

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1537726

playbooks/openshift-node/private/restart.yml

@@ -16,6 +16,7 @@
     until: not (l_docker_restart_docker_in_node_result is failed)
     retries: 3
     delay: 30
+    when: openshift_node_restart_docker_required | default(True)
 
   - name: Restart containerized services
     service:

playbooks/openshift-node/redeploy-certificates.yml

@@ -4,3 +4,5 @@
 - import_playbook: private/redeploy-certificates.yml
 
 - import_playbook: private/restart.yml
+  vars:
+    openshift_node_restart_docker_required: False