Fix for helm panic due to empty list, always comment images if empty

Change-Id: Ic316233ed10cd91ba6308e79afaaecfc81348f19
diff --git a/kubernetes-configs/voltha/onf-demo-pod.yml b/kubernetes-configs/voltha/onf-demo-pod.yml
index 4aceda3..60e5020 100644
--- a/kubernetes-configs/voltha/onf-demo-pod.yml
+++ b/kubernetes-configs/voltha/onf-demo-pod.yml
@@ -20,7 +20,7 @@
 onosApiPort: 30120
 onosOfPort: 31653
 
-images:
+#images:
 #  onos:
 #    repository: voltha/voltha-onos@sha256
 #    tag: 6f23767b85a6515bc465c4678c945d194551dd27abe2cf1b926a524b5e9eb3e6