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/dashboard.yml b/classes/cluster/virtual-mcp-mitaka-ovs-trusty/openstack/dashboard.yml
index 050c6cd..177b577 100644
--- a/classes/cluster/virtual-mcp-mitaka-ovs-trusty/openstack/dashboard.yml
+++ b/classes/cluster/virtual-mcp-mitaka-ovs-trusty/openstack/dashboard.yml
@@ -7,7 +7,7 @@
   linux:
     network:
       interface:
-        ens4:
+        eth1:
           enabled: true
           type: eth
           proto: static