Flaky Test: InterpreterOutputChangeWatcher.test

Running org.apache.zeppelin.interpreter.InterpreterOutputChangeWatcherTest
15:12:09,215  INFO org.apache.zeppelin.interpreter.InterpreterOutputChangeWatcher:71 - watch /tmp/ZeppelinLTest_1498403528213
15:12:10,223  INFO org.apache.zeppelin.interpreter.InterpreterOutputChangeWatcher:125 - File change detected /tmp/ZeppelinLTest_1498403528213/test1
15:12:10,224  INFO org.apache.zeppelin.interpreter.InterpreterOutputChangeWatcher:125 - File change detected /tmp/ZeppelinLTest_1498403528213/test1
Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 32.034 sec <<< FAILURE! - in org.apache.zeppelin.interpreter.InterpreterOutputChangeWatcherTest
test(org.apache.zeppelin.interpreter.InterpreterOutputChangeWatcherTest)  Time elapsed: 32.031 sec  <<< FAILURE!
java.lang.AssertionError: expected:<1> but was:<2>
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.failNotEquals(Assert.java:834)
	at org.junit.Assert.assertEquals(Assert.java:645)
	at org.junit.Assert.assertEquals(Assert.java:631)
	at org.apache.zeppelin.interpreter.InterpreterOutputChangeWatcherTest.test(InterpreterOutputChangeWatcherTest.java:95)