Unhard-coded 'message_queue:port:${_param:rabbitmq_port}'

Change-Id: I9c57a01b4e9f3b5cc03a7618ac8b7af1d227ab76
diff --git a/ceilometer/server/cluster.yml b/ceilometer/server/cluster.yml
index 4a24dda..f5aea52 100644
--- a/ceilometer/server/cluster.yml
+++ b/ceilometer/server/cluster.yml
@@ -5,6 +5,8 @@
 - system.haproxy.proxy.listen.openstack.ceilometer
 - system.keepalived.cluster.instance.openstack_telemetry_vip
 parameters:
+  _param:
+    openstack_rabbitmq_port: 5672
   ceilometer:
     server:
       enabled: true
@@ -32,6 +34,7 @@
         region: ${_param:openstack_region}
         protocol: ${_param:cluster_internal_protocol}
       message_queue:
+        port: ${_param:openstack_rabbitmq_port}
         engine: rabbitmq
         members:
           - host: ${_param:openstack_message_queue_node01_address}