When using rabbit_transport_url in a multi node environment, the address
used is the bind_address if we do not use a mq cluster, where it should
be the rabbit server endpoint hostname, if not we can end up with some
transport_url configurations as rabbit://<...>@0.0.0.0:<...>, if the
rabbit server is configured to listen on all interfaces.
Change-Id: I617f54030ca3610638e6fd1bd3215dc2e7b23841
Signed-off-by: Manuel Torrinha <manuel.torrinha@tecnico.ulisboa.pt>