Minor fix in 'Verify restart ofagent container before subscriber is provisioned' to support different namespaces

Change-Id: If19e695327d9ec61639fed9c4d3a3b3b0de33374
diff --git a/tests/functional/Voltha_FailureScenarios.robot b/tests/functional/Voltha_FailureScenarios.robot
index 58bbbbf..22a576c 100755
--- a/tests/functional/Voltha_FailureScenarios.robot
+++ b/tests/functional/Voltha_FailureScenarios.robot
@@ -645,7 +645,7 @@
     [Setup]    Start Logging    ofagentRestart2
     [Teardown]    Run Keywords    Collect Logs
     ...           AND             Stop Logging    ofagentRestart2
-    ...           AND             Scale K8s Deployment    ${NAMESPACE}    ${NAMESPACE}-voltha-ofagent    1
+    ...           AND             Scale K8s Deployment    ${NAMESPACE}    ${STACK_NAME}-voltha-ofagent    1
     Delete All Devices And Verify
     setup
     Run Keyword If    ${has_dataplane}    Clean Up Linux