[RabbitMQ] Removed deprecated ha_queue option.

Change-Id: Ief8260615f4254093fc6be3ea164c2a5e42b8380
diff --git a/metadata/service/control/cluster.yml b/metadata/service/control/cluster.yml
index f27ed77..9fabdc4 100644
--- a/metadata/service/control/cluster.yml
+++ b/metadata/service/control/cluster.yml
@@ -37,7 +37,6 @@
         user: openstack
         password: ${_param:rabbitmq_openstack_password}
         virtual_host: '/openstack'
-        ha_queues: true
       storage:
         engine: file
       cache: