Change k8s network.engine to network.cnis list.

Change-Id: I43d26f79bed68e32c189f04120769427b7eccc81
diff --git a/classes/cluster/k8s-ha-calico/kubernetes/control.yml b/classes/cluster/k8s-ha-calico/kubernetes/control.yml
index 2185d59..6629e13 100644
--- a/classes/cluster/k8s-ha-calico/kubernetes/control.yml
+++ b/classes/cluster/k8s-ha-calico/kubernetes/control.yml
@@ -59,6 +59,8 @@
         ssl:
           enabled: true
       network:
+        cnis:
+        - calico
         calico:
           etcd:
             ssl: