Transient unit test problem

[drcrallen]

Tests run: 6, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.615 sec <<< FAILURE! - in io.druid.server.namespace.cache.NamespaceExtractionCacheManagerExecutorsTest testRunCount(io.druid.server.namespace.cache.NamespaceExtractionCacheManagerExecutorsTest) Time elapsed: 0.089 sec <<< FAILURE! java.lang.AssertionError: null at org.junit.Assert.fail(Assert.java:86) at org.junit.Assert.assertTrue(Assert.java:41) at org.junit.Assert.assertTrue(Assert.java:52) at io.druid.server.namespace.cache.NamespaceExtractionCacheManagerExecutorsTest.testRunCount(NamespaceExtractionCacheManagerExecutorsTest.java:436)