Bind EPMD to api interface address

Closes-Bug: #1562701
Change-Id: Ica68bdee81223232995bc21ad5e5d5fbf9e8b05f

ansible/roles/rabbitmq/templates/rabbitmq-env.conf.j2

@@ -6,14 +6,5 @@ RABBITMQ_SERVER_ADDITIONAL_ERL_ARGS="-pa /usr/lib/rabbitmq/lib/{{ rabbitmq_versi
 
 RABBITMQ_LOG_BASE=/var/log/kolla/rabbitmq
 
-# TODO(sdake, vhosakot)
-# erlang by default binds to wildcard (all interfaces) and can potentially
-# interfere with the neutron external or tenant networks. We should in theory
-# bind epmd to the host's IPv4 address to address the issue however this also
-# has issues and can crash erlang when it is compiled with IPv6 support.
-# See bugs:
-# https://bugs.launchpad.net/ubuntu/+source/erlang/+bug/1374109
-# https://bugs.launchpad.net/kolla/+bug/1562701
-# https://bugzilla.redhat.com/show_bug.cgi?id=1324922
-
+export ERL_EPMD_ADDRESS={{ api_interface_address }}
 export ERL_EPMD_PORT={{ rabbitmq_epmd_port }}