Fixed TC teardown for TT Multi-Tcont scenario TcontType2Onu1Type3Onu2

Change-Id: Iba6c833a805f9605924f912eeb75c80556c9ee59
diff --git a/tests/tt-workflow/Voltha_TT_MultiTcontTests.robot b/tests/tt-workflow/Voltha_TT_MultiTcontTests.robot
index c282a18..4adfcc6 100755
--- a/tests/tt-workflow/Voltha_TT_MultiTcontTests.robot
+++ b/tests/tt-workflow/Voltha_TT_MultiTcontTests.robot
@@ -305,6 +305,7 @@
     ...        AND             Setup
     [Teardown]    Run Keywords    Collect Logs
     ...           AND             Stop Logging    TcontType2Onu1Type3Onu2
+    ...           AND             Delete All Devices and Verify
     # Push multi-tcont sadis to ONOS
     Send File To Onos    ${CURDIR}/../../tests/data/flex-ocp-cord-sadis-TT-multi-tcont.json
     Run Keyword If    ${has_dataplane}    Clean Up Linux