Comment 14 for bug 2023668

Confirm that it _is_ in fact the container image and not the Ansible code.
Forcing use of the dockerhub image via `rabbitmq_image: "kolla/ubuntu-source-rabbitmq"` and then running the upgrade for the rabbitmq tag produces clean logs.

Had something simialar going on with the mariadb containers and had to drop STACKLEAK (of all things) to get them to replicate correctly - those were just failing silently.