Add a timeout in LoadQueuePeon to fail an assign if it takes too long

Toggle between compressed and non compressed service discovery

Fix path used when storing segments to HDFS

Improve robustness and usability of RealtimeIndexTask and some code cleanup in the Indexing Service

Minor fixes - maven dependency, unit test that was failing and quirk for third party S3 provider

Fix issue with realtime nodes selecting intervals that are too large in the results

Adding a dependency on Apache commons httpclient in the Druid client pom.xml. It currently gets pulled in through some dependencies but it should be explicitly set.

- Realtime plumber will start persisting segments shortly after finishJob is called, regardless
  of rejection policy

- Add "none" rejection policy

Changed method of publishing segment ownership to ZK to use batching, includes changes to allow for migration