[RabbitMQ] Parametrized message queue hosts to enable client-side HA.

Change-Id: Ie092a7e53d0ae4efcd2b6b56c0854723fd27863f
diff --git a/tests/pillar/control_cluster.sls b/tests/pillar/control_cluster.sls
index 5e33712..018f222 100644
--- a/tests/pillar/control_cluster.sls
+++ b/tests/pillar/control_cluster.sls
@@ -33,8 +33,10 @@
       tenant: service
     message_queue:
       engine: rabbitmq
-      host: 127.0.0.1
-      port: 5672
+      members:
+      - host: 127.0.0.1
+      - host: 127.0.1.1
+      - host: 127.0.2.1
       user: openstack
       password: password
       virtual_host: '/openstack'