Defaulting the profile to voltha/voltha_voltha, according to default-helm-charts

Change-Id: I9332e99b9b94838a8e3f10314640a40df317a4f9
diff --git a/libraries/utils.robot b/libraries/utils.robot
index cfd4235..f30a5f5 100755
--- a/libraries/utils.robot
+++ b/libraries/utils.robot
@@ -1482,7 +1482,7 @@
 
 Validate Cleanup In ETCD
     [Documentation]    The keyword verifies that device, ports, flows, meters are all cleared in ETCD
-    [Arguments]    ${namespace}=default    ${defaultkvstoreprefix}=voltha_voltha
+    [Arguments]    ${namespace}=default    ${defaultkvstoreprefix}=voltha/voltha_voltha
     ${podname}=    Set Variable    etcd
     ${kvstoreprefix}=    Get Kv Store Prefix    ${defaultkvstoreprefix}
     # Log Devices Output and Verify Output Should be Empty