Change k8s network.engine to network.cnis list.

Change-Id: I43d26f79bed68e32c189f04120769427b7eccc81
diff --git a/classes/cluster/k8s-aio-calico/kubernetes/control.yml b/classes/cluster/k8s-aio-calico/kubernetes/control.yml
index b14ecf9..0616a0f 100644
--- a/classes/cluster/k8s-aio-calico/kubernetes/control.yml
+++ b/classes/cluster/k8s-aio-calico/kubernetes/control.yml
@@ -51,6 +51,8 @@
       kubelet:
         address: ${_param:single_address}
       network:
+        cnis:
+        - calico
         calico:
           etcd:
             ssl: