Add memcached to contrail labs

Change-Id: Id6307bf14bb92aa4791f5c7af5a552d2f5fa5103
diff --git a/classes/cluster/os-ha-contrail-40/opencontrail/control.yml b/classes/cluster/os-ha-contrail-40/opencontrail/control.yml
index 4a4fab2..1286459 100644
--- a/classes/cluster/os-ha-contrail-40/opencontrail/control.yml
+++ b/classes/cluster/os-ha-contrail-40/opencontrail/control.yml
@@ -17,6 +17,7 @@
 - system.opencontrail.client.resource.global_vrouter_config
 - system.haproxy.proxy.listen.opencontrail.analytics
 - system.docker.client.compose
+- system.memcached.server.single
 - cluster.os-ha-contrail-40
 parameters:
   _param:
@@ -52,3 +53,13 @@
       pkgs:
         - docker-engine
         - python-docker
+  opencontrail:
+    config:
+      cache:
+        members:
+          - host: ${_param:opencontrail_control_node01_address}
+            port: 11211
+          - host: ${_param:opencontrail_control_node02_address}
+            port: 11211
+          - host: ${_param:opencontrail_control_node03_address}
+            port: 11211