VOL-2340 Fix device not deleted in ONOS

Change-Id: I9295a6d6f088704c7ced6087c3a7124aa2690002
diff --git a/tests/functional/Voltha_ScaleFunctionalTests.robot b/tests/functional/Voltha_ScaleFunctionalTests.robot
index b4f46e2..8ff1396 100644
--- a/tests/functional/Voltha_ScaleFunctionalTests.robot
+++ b/tests/functional/Voltha_ScaleFunctionalTests.robot
@@ -121,7 +121,7 @@
     Run Keyword If    ${has_dataplane}    Clean Up Linux
     Run Keyword If    ${external_libs}    Log Kubernetes Containers Logs Since Time    ${datetime}    ${container_list}
     Run Keyword If    ${teardown_device}    Delete Device and Verify
-    ${length}=    Run Keyword If    ${teardown_device}    Run Keyword And Return    Test Empty Device List
+    ${length}=    Run Keyword If    ${teardown_device}    Test Empty Device List
     Run Keyword If    ${teardown_device}    Should Be Equal As Integers    ${length}    0
     Run Keyword If    ${teardown_device}    Execute ONOS CLI Command    ${k8s_node_ip}    ${ONOS_SSH_PORT}
     ...    device-remove ${of_id}