The intention for the patch is to increase the stability of
1. Use a single RabbitMQ cluster for all OpenStack services.
2. Use 2 replicas for RabbitMQ clusters instead of 3; RabbitMQ
does not implement a quorum mechanism which allows us to have
even number of nodes, this should provide better performance
by reducing the number of instances where the data should be
replicated. This should also reduce the odds of getting
Co-authored-by: Drew Walters <email@example.com>