Move VIP for kube-api from ens4/vhost0 to ens3

keepalived interferes with contrails which requires a reboot to get
keepalived working. Even though it doesn't give a guarantee of
stability. This patch move VIP to ens3 for both contrail and calico
models.

Change-Id: Ib91cc375f9092f7c16c83d25be5ea0fc8ab3b36c
diff --git a/classes/cluster/sl_k8s_contrail/kubernetes/control.yml b/classes/cluster/sl_k8s_contrail/kubernetes/control.yml
index 71d1948..2b870a1 100644
--- a/classes/cluster/sl_k8s_contrail/kubernetes/control.yml
+++ b/classes/cluster/sl_k8s_contrail/kubernetes/control.yml
@@ -8,7 +8,7 @@
 - cluster.sl_k8s_contrail
 parameters:
   _param:
-    keepalived_vip_interface: vhost0
+    keepalived_vip_interface: ens3
     keepalived_vip_virtual_router_id: 60
   etcd:
     server: