Comment 4 for bug 1627729

So I had a chat with Peter this morning and we need to at least try with updated packages. Namely:
- rabbitmq 3.6.3-3
- erlang-erts-18.3.4.1

The versions I had in my image are the following:
[root@overcloud-controller-1 heat-admin]# rpm -qa |grep -E "^rabbitmq|erlang-erts"
rabbitmq-server-3.6.2-3.el7.noarch
erlang-erts-18.3.3-1.el7.x86_64