Tagged DisableDeleteOLTTt TC as notready till VOL-4139 is resolved

Change-Id: I8d2b375ada30c64d6d32a8cd1f609aac072fa9f9
diff --git a/tests/tt-workflow/Voltha_TT_PODTests.robot b/tests/tt-workflow/Voltha_TT_PODTests.robot
index 9caf40b..d811b65 100755
--- a/tests/tt-workflow/Voltha_TT_PODTests.robot
+++ b/tests/tt-workflow/Voltha_TT_PODTests.robot
@@ -106,7 +106,7 @@
     ...    Assuming that all the ONUs are DHCP/pingable (i.e. assuming sanityTt test was executed)
     ...    Perform disable on the OLT and validate ONUs state and that the pings do not succeed
     ...    Perform delete on the OLT, Re-do Setup (Recreate the OLT) and Perform Sanity Test TT
-    [Tags]    functionalTT    DisableDeleteOLTTt
+    [Tags]    functionalTT    DisableDeleteOLTTt    notready
     [Setup]    Start Logging    DisableDeleteOLTTt
     [Teardown]    Run Keywords    Collect Logs
     ...           AND             Stop Logging    DisableDeleteOLTTt