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/infra/init.yml b/classes/cluster/virtual-mcp11-k8s-calico/infra/init.yml
index f646f66..29af1e1 100644
--- a/classes/cluster/virtual-mcp11-k8s-calico/infra/init.yml
+++ b/classes/cluster/virtual-mcp11-k8s-calico/infra/init.yml
@@ -14,7 +14,7 @@
 - service.grafana.collector
 - cluster.virtual-mcp11-k8s-calico.kubernetes
 - cluster.virtual-mcp11-k8s-calico.stacklight
-- cluster.overwrite
+- cluster.overrides
 parameters:
   _param:
     # infra service addresses