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

Change-Id: I9c57a01b4e9f3b5cc03a7618ac8b7af1d227ab76
diff --git a/cinder/volume/single.yml b/cinder/volume/single.yml
index 637e45a..03c4b3c 100644
--- a/cinder/volume/single.yml
+++ b/cinder/volume/single.yml
@@ -9,6 +9,7 @@
     galera_ssl_enabled: False
     openstack_rabbitmq_x509_enabled: False
     rabbitmq_ssl_enabled: False
+    openstack_rabbitmq_port: 5672
   linux:
     system:
       package:
@@ -31,6 +32,7 @@
         host: ${_param:openstack_control_address}
         protocol: ${_param:cluster_internal_protocol}
       message_queue:
+        port: ${_param:openstack_rabbitmq_port}
         members:
           - host: ${_param:openstack_message_queue_node01_address}
           - host: ${_param:openstack_message_queue_node02_address}