The naming issue with k8s configmaps keys already fixed:
https://review.openstack.org/#/c/418946/
So, we can revert the template name back to oslo_messaging
Change-Id: I6267e0fe362299bb01836643bc3b6a201a73da78
Depends-On: I5224f93a605594a41b527ab0f549bd39545931f5