Wait for ONU to become DISABLED

Change-Id: Ia94bc3eae3eaca9cc352c4b52a7d1e385e051f04
diff --git a/tests/functional/Voltha_PODTests.robot b/tests/functional/Voltha_PODTests.robot
index 631d275..1f70885 100644
--- a/tests/functional/Voltha_PODTests.robot
+++ b/tests/functional/Voltha_PODTests.robot
@@ -137,7 +137,7 @@
         ${onu_port}=    Wait Until Keyword Succeeds    ${timeout}    2s    Get ONU Port in ONOS    ${src['onu']}
         ...    ${of_id}
         Disable Device    ${onu_device_id}
-        #Test Devices Disabled in VOLTHA    Id=${onu_device_id}
+        Wait Until Keyword Succeeds    20s    2s    Test Devices Disabled in VOLTHA    Id=${onu_device_id}
         Run Keyword If    ${has_dataplane}    Run Keyword And Continue On Failure
         ...    Wait Until Keyword Succeeds    60s    2s
         ...    Check Ping    False    ${dst['dp_iface_ip_qinq']}    ${src['dp_iface_name']}