Fix ZkStreamProcessor tests

Here are the failures from the jenkins build

testStreamProcessorWithRemove FAILED
java.lang.AssertionError: Timed out while waiting for the processor to start/stop.
at org.junit.Assert.fail(Assert.java:91)
at org.apache.samza.processor.TestZkStreamProcessorBase.waitForProcessorToStartStop(TestZkStreamProcessorBase.java:313)
at org.apache.samza.processor.TestZkStreamProcessor.testStreamProcessorWithRemove(TestZkStreamProcessor.java:226)

testStreamProcessorWithAdd FAILED
java.lang.AssertionError: Timed out while waiting for the processor to start/stop.
at org.junit.Assert.fail(Assert.java:91)
at org.apache.samza.processor.TestZkStreamProcessorBase.waitForProcessorToStartStop(TestZkStreamProcessorBase.java:313)
at org.apache.samza.processor.TestZkStreamProcessor.testStreamProcessorWithAdd(TestZkStreamProcessor.java:142)

testFailStreamProcessor FAILED
java.lang.AssertionError: Timed out while waiting for the processor to start/stop.
at org.junit.Assert.fail(Assert.java:91)
at org.apache.samza.processor.TestZkStreamProcessorBase.waitForProcessorToStartStop(TestZkStreamProcessorBase.java:313)
at org.apache.samza.processor.TestZkStreamProcessorFailures.testFailStreamProcessor(TestZkStreamProcessorFailures.java:104)

testFiveStreamProcessors FAILED
java.lang.AssertionError: Timed out while waiting for the processor to start/stop.
at org.junit.Assert.fail(Assert.java:91)
at org.apache.samza.processor.TestZkStreamProcessorBase.waitForProcessorToStartStop(TestZkStreamProcessorBase.java:313)
at org.apache.samza.processor.TestZkStreamProcessorSession.testStreamProcessorWithSessionRestart(TestZkStreamProcessorSession.java:113)
at org.apache.samza.processor.TestZkStreamProcessorSession.testFiveStreamProcessors(TestZkStreamProcessorSession.java:54)