Add nginx-ingress addon switcher in k8s models

Change-Id: Ic4e537b59d3c53c3b97be3f10250769da620658e
diff --git a/classes/cluster/k8s-ha-contrail-40/kubernetes/control.yml b/classes/cluster/k8s-ha-contrail-40/kubernetes/control.yml
index f83f9a4..5eddc11 100644
--- a/classes/cluster/k8s-ha-contrail-40/kubernetes/control.yml
+++ b/classes/cluster/k8s-ha-contrail-40/kubernetes/control.yml
@@ -80,6 +80,8 @@
           enabled: ${_param:kubernetes_externaldns_enabled}
           image: ${_param:kubernetes_externaldns_image}
           provider: ${_param:kubernetes_externaldns_provider}
+        ingress-nginx:
+          enabled: ${_param:kubernetes_ingressnginx_enabled}
       hyperkube:
         image: ${_param:kubernetes_hyperkube_image}
     master: