Increase timer to allow for OLT to become available in ONOS after
rw-core restart. The test times out before the device becomes available.

Change-Id: Id1198bdc619f0055b986bd8840d477d974e241a7
diff --git a/tests/dt-workflow/Voltha_DT_FailureScenarios.robot b/tests/dt-workflow/Voltha_DT_FailureScenarios.robot
index 22d85c2..7389f51 100755
--- a/tests/dt-workflow/Voltha_DT_FailureScenarios.robot
+++ b/tests/dt-workflow/Voltha_DT_FailureScenarios.robot
@@ -412,7 +412,7 @@
         ${olt_device_id}=    Get OLTDeviceID From OLT List    ${olt_serial_number}
         ${of_id}=    Wait Until Keyword Succeeds    ${timeout}    15s    Validate OLT Device in ONOS
         ...    ${olt_serial_number}
-        Wait Until Keyword Succeeds    ${timeout}    2s    Device Is Available In ONOS
+        Wait Until Keyword Succeeds    120s    2s    Device Is Available In ONOS
         ...    http://karaf:karaf@${ONOS_REST_IP}:${ONOS_REST_PORT}    ${of_id}
     END