Merge pull request #6356 from jcantrill/1519622_disable_revision_history

bug 1519622. Disable rollback of ES DCs

roles/openshift_logging_elasticsearch/templates/es.j2

@@ -9,6 +9,7 @@ metadata:
     logging-infra: "{{logging_component}}"
 spec:
   replicas: {{es_replicas|default(1)}}
+  revisionHistoryLimit: 0
   selector:
     provider: openshift
     component: "{{component}}"