Fix all transient test failures

[fjy]

I made all these changes together to make it easier to see if tests are passing or not.

This PR serves to:

• Fix Transient failure on io.druid.curator.announcement.AnnouncerTest testSessionKilled #2167
• Fix Transient failure on io.druid.server.namespace.cache.JDBCExtractionNamespaceTest testFindNew #2160
• Fix Transient failure on io.druid.indexing.common.task.RealtimeIndexTaskTest testBasics #2159
• Fix Transient failure on io.druid.indexing.overlord.TaskLifecycleTest testRealtimeIndexTaskFailure #2158
• Fix Transient test error in SimpleResourceManagementStrategyTest.testProvisionAlert #2147
• Fix Non-deterministic io.druid.query.extraction.namespace.TestKafkaExtractionCluster testSimpleRename #2113

[fjy]

io.druid.curator.announcement.AnnouncerTest
testSessionKilled(io.druid.curator.announcement.AnnouncerTest) Time elapsed: 2.233 sec <<< FAILURE!
java.lang.AssertionError: expected null, but was:<10,10,1451284237249,1451284237249,0,0,0,95111363629613057,25,0,10

at org.junit.Assert.fail(Assert.java:88)
at org.junit.Assert.failNotNull(Assert.java:664)
at org.junit.Assert.assertNull(Assert.java:646)
at org.junit.Assert.assertNull(Assert.java:656)
at io.druid.curator.announcement.AnnouncerTest.testSessionKilled(AnnouncerTest.java:175)

[fjy]

5 straight passes :D

[gianm]

Instead of having a timeout here, how about having this never timeout and instead applying a timeout to the test? @Test(timeout = blah). Seems like it would be more robust to have one big timeout than a lot of little timeouts that would be more sensitive to noise.

[gianm]

👍 after travis