[VOL-3679] clear all devices before starting multi olt tests

Change-Id: I1936114178dd61902159b6820127d1ed27e81003
diff --git a/tests/functional/Voltha_MultiOLT_Tests.robot b/tests/functional/Voltha_MultiOLT_Tests.robot
index aae5d5c..1699e1a 100644
--- a/tests/functional/Voltha_MultiOLT_Tests.robot
+++ b/tests/functional/Voltha_MultiOLT_Tests.robot
@@ -65,7 +65,7 @@
     [Setup]    Start Logging    MultipleOlt-PhysicalOLTReboot
     [Teardown]    Run Keywords    Collect Logs
     ...           AND             Stop Logging    MultipleOlt-PhysicalOLTReboot
-    #...           AND             Delete All Devices and Verify
+    Delete All Devices and Verify
     # Add OLT device
     setup
     # Performing Sanity Test to make sure subscribers are all AUTH+DHCP and pingable