Mitaka release configuration files support

Change-Id: I0813930b0aa3d4eabe2b2e86d8a55c8e852cc722
diff --git a/metadata/service/control/cluster.yml b/metadata/service/control/cluster.yml
index 1f6207b..f27ed77 100644
--- a/metadata/service/control/cluster.yml
+++ b/metadata/service/control/cluster.yml
@@ -40,3 +40,12 @@
         ha_queues: true
       storage:
         engine: file
+      cache:
+        engine: memcached
+        members:
+        - host: ${_param:cluster_node01_address}
+          port: 11211
+        - host: ${_param:cluster_node02_address}
+          port: 11211
+        - host: ${_param:cluster_node03_address}
+          port: 11211