"pass" field is needed for Zyxcel ONU RG configuration

Change-Id: I85227119e7c381034c43a714f91d72a8cee45466
diff --git a/deployment-configs/menlo-certification-pod-radisys-1600x-DT.yaml b/deployment-configs/menlo-certification-pod-radisys-1600x-DT.yaml
index 29751f8..4f9a030 100644
--- a/deployment-configs/menlo-certification-pod-radisys-1600x-DT.yaml
+++ b/deployment-configs/menlo-certification-pod-radisys-1600x-DT.yaml
@@ -100,6 +100,7 @@
       -
         ip: 10.90.0.51
         user: ubuntu
+        pass: null
         dp_iface_name: eth1.92
         container_type: LXC
         container_name: ZYWN67C18B52