removing rwcore from nightly job due to issues that requires reinstall of voltha

Change-Id: Iec1db449ae6d65b56d706b040f63790a555b3309
diff --git a/tests/functional/Voltha_FailureScenarios.robot b/tests/functional/Voltha_FailureScenarios.robot
index 5bb7324..f9bcfaa 100644
--- a/tests/functional/Voltha_FailureScenarios.robot
+++ b/tests/functional/Voltha_FailureScenarios.robot
@@ -183,7 +183,7 @@
     ...    simulate a POD crash. The test then scales the rw-core back to a single instance
     ...    and configures ONOS for access. The test succeeds if the device is able to
     ...    complete the DHCP sequence.
-    [Tags]    functional    rwcore-restart
+    [Tags]    functional    rwcore-restart    notready
     [Setup]    Run Keywords    Announce Message    START TEST RwCoreFailAndRestart
     ...        AND             Start Logging    RwCoreFailAndRestart
     ...        AND             Clear All Devices Then Create New Device