TEZ-1386. TezGroupedSplitsInputFormat should not need to be setup to
enable grouping. (sseth)
TEZ-1392. Fix MRRSleepJob failure. (sseth)
TEZ-1394. Create example code for OrderedWordCount (bikas)
TEZ-1394. Create example code for OrderedWordCount (bikas)
TEZ-1372. Fix preWarm to work after recent API changes (bikas)
TEZ-1372. Fix preWarm to work after recent API changes (bikas)
TEZ-1372. Remove author tag from previous commit (bikas)
Merge branch 'master' into test

Conflicts:
	tez-dag/src/main/java/org/apache/tez/dag/api/client/DAGClientHandler.java
	tez-dag/src/main/java/org/apache/tez/dag/api/client/rpc/DAGClientAMProtocolBlockingPBServerImpl.java