Update keyword trigger

Change-Id: I9a22de252794c0dce1a280df2ea6bf32bdb66c96
diff --git a/tests/functional/Voltha_MultiOLT_Tests.robot b/tests/functional/Voltha_MultiOLT_Tests.robot
index 1699e1a..c373406 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
-    Delete All Devices and Verify
+    Run Keyword and Ignore Error    Delete All Devices and Verify
     # Add OLT device
     setup
     # Performing Sanity Test to make sure subscribers are all AUTH+DHCP and pingable