fix interfaces for k8s and opencontrail

Change-Id: I70129e5f5e4da214ab2df82fca0a6e9140bf459e
diff --git a/classes/cluster/k8s_ha_contrail/infra/config.yml b/classes/cluster/k8s_ha_contrail/infra/config.yml
index 7a50368..30e09e7 100644
--- a/classes/cluster/k8s_ha_contrail/infra/config.yml
+++ b/classes/cluster/k8s_ha_contrail/infra/config.yml
@@ -24,6 +24,15 @@
       reactor:
         reclass/minion/classify:
         - salt://reclass/reactor/node_register.sls
+  linux:
+    network:
+      interface:
+        ens4:
+          enabled: true
+          type: eth
+          proto: static
+          address: ${_param:single_address}
+          netmask: 255.255.255.0
   reclass:
     storage:
       class_mapping: