SEBA-730 Fix atests for recent Helm chart changes

Change-Id: I5d8d5a66d2c81fa3a0f3893b4453a94f6fc31e89
diff --git a/tests/atests/common/auto_test.py b/tests/atests/common/auto_test.py
index 4dea0ab..be52134 100755
--- a/tests/atests/common/auto_test.py
+++ b/tests/atests/common/auto_test.py
@@ -75,7 +75,7 @@
     if simtype == 'ponsim':
         olt_type = 'ponsim_olt'
         onu_type = 'ponsim_onu'
-        olt_host_ip = 'olt.voltha.svc'
+        olt_host_ip = 'olt0.voltha.svc'
         onu_count = 1
     elif simtype == 'bbsim':
         olt_type = 'openolt'