Use custom image for rw-core to test fix from Kent

Change-Id: I888d79de59433a661763af17197cfc7ac633f433
diff --git a/kubernetes-configs/voltha/onf-demo-pod.yml b/kubernetes-configs/voltha/onf-demo-pod.yml
index b51e753..fb86b3e 100644
--- a/kubernetes-configs/voltha/onf-demo-pod.yml
+++ b/kubernetes-configs/voltha/onf-demo-pod.yml
@@ -30,9 +30,9 @@
 #  adapter_open_olt:
 #    repository: gcgirish/voltha-openolt-adapter
 #    tag: flow-sync
-#  rw_core:
-#    repository: gcgirish/voltha-rw-core
-#    tag: delete-device
+  rw_core:
+    repository: khagerma/voltha-rw-core
+    tag: update-port-fix
 deployments:
   etcdOperator: true
   backupOperator: false