rpc_backend variable removed, already set in the called class.

manifests/profile/cinder.pp

@@ -27,7 +27,6 @@ class iaas::profile::cinder (
     database_connection => $iaas::resources::connectors::cinder,
 #Added rabbit_hosts
 #    rabbit_host => $endpoint,
-    rpc_backend => 'rabbit',
     rabbit_hosts => $rhosts,
     rabbit_userid => $rabbitmq_user,
     rabbit_password => $rabbitmq_password,