Fixed SOAK_TEST flag

Change-Id: I467b3f7222bbba26e6732cc8a2ef0d09a5c3d942
diff --git a/tests/dt-workflow/Voltha_DT_PODTests.robot b/tests/dt-workflow/Voltha_DT_PODTests.robot
index 378b673..be3c297 100644
--- a/tests/dt-workflow/Voltha_DT_PODTests.robot
+++ b/tests/dt-workflow/Voltha_DT_PODTests.robot
@@ -449,7 +449,7 @@
     ...           AND    Stop Logging    BandwidthProfileTCPDt
     Pass Execution If   '${has_dataplane}'=='False'    Bandwidth profile validation can be done only in
     ...    physical pod.  Skipping this test in BBSIM.
-    Run Keyword If    'SOAK_TEST'=='False'    Clear All Devices Then Create New Device
+    Run Keyword If    '${SOAK_TEST}'=='False'    Clear All Devices Then Create New Device
     ...    ELSE    Setup Soak
     Run Keyword If    ${has_dataplane}    Clean Up Linux
     Wait Until Keyword Succeeds    ${timeout}    2s    Perform Sanity Test DT