Update OLT address for lookup in any namespace

Change-Id: I542abd4aadd4e20085ec718bc11bd7fc1d41ff14
diff --git a/xos-profiles/ponsim-pod/tosca/020-pod-olt.yaml b/xos-profiles/ponsim-pod/tosca/020-pod-olt.yaml
index 950fea3..724d56c 100644
--- a/xos-profiles/ponsim-pod/tosca/020-pod-olt.yaml
+++ b/xos-profiles/ponsim-pod/tosca/020-pod-olt.yaml
@@ -34,7 +34,7 @@
       properties:
         name: PONSIM OLT
         device_type: ponsim_olt
-        host: olt
+        host: olt.voltha.svc
         port: 50060
         switch_datapath_id: of:0000000000000001
         switch_port: "2"