Fix of K8s+OC4.0 virtual lab

Change-Id: Ic2ff161b44f6ced3f1ac04054c56e45e283e18f2
diff --git a/classes/cluster/k8s-ha-contrail-40/kubernetes/control.yml b/classes/cluster/k8s-ha-contrail-40/kubernetes/control.yml
index 2f3d81e..b9388c8 100644
--- a/classes/cluster/k8s-ha-contrail-40/kubernetes/control.yml
+++ b/classes/cluster/k8s-ha-contrail-40/kubernetes/control.yml
@@ -23,9 +23,7 @@
           enabled: true
           type: eth
           mtu: 1500
-          address: ${_param:deploy_address}
-          netmask: '255.255.255.0'
-          ipflush_onchange: true
+          proto: dhcp
 
         ens4:
           enabled: true