TestRecurringJobQueue.testCreateStoppedQueue is unstable due to NullPointerException

[alirezazamani]

[ERROR] testCreateStoppedQueue(org.apache.helix.integration.task.TestRecurringJobQueue) Time elapsed: 1.033 s <<< FAILURE!
java.lang.NullPointerException
at org.apache.helix.integration.task.TestRecurringJobQueue.testCreateStoppedQueue(TestRecurringJobQueue.java:246)