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

Change-Id: I8fead4ffcc59e02660a45a4226375141bf73a6f0
diff --git a/tests/pillar/server_cluster.sls b/tests/pillar/server_cluster.sls
index b273bd3..9b3c41c 100644
--- a/tests/pillar/server_cluster.sls
+++ b/tests/pillar/server_cluster.sls
@@ -19,12 +19,13 @@
       password: password
     message_queue:
       engine: rabbitmq
-      host: 127.0.0.1
-      port: 5672
+      members:
+      - host: 127.0.0.1
+      - host: 127.0.0.1
+      - host: 127.0.0.1
       user: openstack
       password: password
       virtual_host: '/openstack'
-      ha_queues: true
       # Workaround for https://bugs.launchpad.net/ceilometer/+bug/1337715
       rpc_thread_pool_size: 5
     database: