Change k8s network.engine to network.cnis list.

Change-Id: I43d26f79bed68e32c189f04120769427b7eccc81
diff --git a/classes/cluster/k8s-aio-calico/kubernetes/compute.yml b/classes/cluster/k8s-aio-calico/kubernetes/compute.yml
index 338f0e1..6c4495f 100644
--- a/classes/cluster/k8s-aio-calico/kubernetes/compute.yml
+++ b/classes/cluster/k8s-aio-calico/kubernetes/compute.yml
@@ -19,6 +19,8 @@
       kubelet:
         address: ${_param:single_address}
       network:
+        cnis:
+        - calico
         calico:
           image: ${_param:kubernetes_calico_image}
           calicoctl_image: ${_param:kubernetes_calico_calicoctl_image}