Fix overwrite for kubernetes images

Now uses overrides.yml instead of overwrite.yml

Change-Id: Ia16e8f1cb3c70261599dc4cf3fcce893442d8f24
diff --git a/classes/cluster/virtual-mcp11-k8s-calico-dyn/kubernetes/control.yml b/classes/cluster/virtual-mcp11-k8s-calico-dyn/kubernetes/control.yml
index 6992a2a..78819b8 100644
--- a/classes/cluster/virtual-mcp11-k8s-calico-dyn/kubernetes/control.yml
+++ b/classes/cluster/virtual-mcp11-k8s-calico-dyn/kubernetes/control.yml
@@ -6,12 +6,11 @@
 - system.kubernetes.master.cluster
 - cluster.virtual-mcp11-k8s-calico-dyn.kubernetes.compute
 - cluster.virtual-mcp11-k8s-calico-dyn
+- cluster.overrides
 parameters:
   _param:
     keepalived_vip_interface: ens4
     keepalived_vip_virtual_router_id: 60
-    kubernetes_netchecker_agent_image: quay.io/l23network/k8s-netchecker-agent:v1.0
-    kubernetes_netchecker_server_image: quay.io/l23network/k8s-netchecker-server:v1.0
   etcd:
     server:
       source: