Change k8s network definitions structure.

Change-Id: Ibb460339e4f059efc1da7df587cad5f79a206068
diff --git a/classes/cluster/virtual-mcp11-k8s-calico-minimal/kubernetes/compute.yml b/classes/cluster/virtual-mcp11-k8s-calico-minimal/kubernetes/compute.yml
index 7ee7b30..fe6c867 100644
--- a/classes/cluster/virtual-mcp11-k8s-calico-minimal/kubernetes/compute.yml
+++ b/classes/cluster/virtual-mcp11-k8s-calico-minimal/kubernetes/compute.yml
@@ -14,9 +14,8 @@
   kubernetes:
     pool:
       network:
-        cnis:
-        - calico
         calico:
+          enabled: true
           image: ${_param:kubernetes_calico_image}
           calicoctl_image: ${_param:kubernetes_calico_calicoctl_image}
           cni_image: ${_param:kubernetes_calico_cni_image}