fix keepalived interface

Change-Id: I4e5f1f178d2625e273e4d706c044de4adb440b81
diff --git a/classes/cluster/virtual-mcp11-contrail/openstack/control.yml b/classes/cluster/virtual-mcp11-contrail/openstack/control.yml
index e2c013d..bd3fca0 100755
--- a/classes/cluster/virtual-mcp11-contrail/openstack/control.yml
+++ b/classes/cluster/virtual-mcp11-contrail/openstack/control.yml
@@ -44,6 +44,7 @@
     cluster_node02_address: ${_param:openstack_control_node02_address}
     cluster_node03_hostname: ctl03
     cluster_node03_address: ${_param:openstack_control_node03_address}
+    keepalived_openstack_telemetry_vip_interface: ens4
   linux:
     system:
       package: