Change k8s network definitions structure.

Change-Id: Ibb460339e4f059efc1da7df587cad5f79a206068
diff --git a/classes/cluster/k8s-ha-contrail/kubernetes/control.yml b/classes/cluster/k8s-ha-contrail/kubernetes/control.yml
index 116cd82..8ef2041 100644
--- a/classes/cluster/k8s-ha-contrail/kubernetes/control.yml
+++ b/classes/cluster/k8s-ha-contrail/kubernetes/control.yml
@@ -58,9 +58,8 @@
         netchecker:
           enabled: true
       network:
-        cnis:
-        - opencontrail
-        contrail:
+        opencontrail:
+          enabled: true
           public_ip_range: 185.22.97.128/26
           public_network: default-domain:default-project:Public
           private_ip_range: 10.150.0.0/16