This change makes rabbitmq container run with the rabbitmq user
instead of the root user. As the rabbitmq user doesn't have write
access to '/run' directory, the templates are updated to use the
'/tmp' directory instead which the rabbitmq user has write access
to.
Change-Id: Ia35c3f741fefe3172c93bb042bf8d26bf7672cfc
f5df62d836