Fix interface naming in mitaka-ovs-trusty model

Change interface naming from ens* to eth*

Change-Id: I917dca28a0450827293f78901b2e3f3506ef2af8
diff --git a/classes/cluster/virtual-mcp-mitaka-ovs-trusty/openstack/control.yml b/classes/cluster/virtual-mcp-mitaka-ovs-trusty/openstack/control.yml
index 7a50acd..bfe22fc 100644
--- a/classes/cluster/virtual-mcp-mitaka-ovs-trusty/openstack/control.yml
+++ b/classes/cluster/virtual-mcp-mitaka-ovs-trusty/openstack/control.yml
@@ -41,7 +41,7 @@
 
 parameters:
   _param:
-    keepalived_vip_interface: ens4
+    keepalived_vip_interface: eth1
   linux:
     system:
       package:
@@ -49,7 +49,7 @@
           version: latest
     network:
       interface:
-        ens4:
+        eth1:
           enabled: true
           type: eth
           proto: static