Fix detection of rabbitmq restart

The bind address and port can be overriden to be different from
the role defaults, so we must check the actual configured values
rather than assume the defaults.

Change-Id: I61a7b7ec91a6e89f2ab060c2853c7f2d17ce1906

tasks/rabbitmq_restart.yml

@@ -18,5 +18,6 @@
 
 - name: Wait for rabbitmq to be started
   wait_for:
-    host: 0.0.0.0
-    port: 5672
+    host: "{{ item.key }}"
+    port: "{{ item.value }}"
+  loop: "{{ query('dict', rabbitmq_port_bindings.tcp_listeners) }}"