HADOOP-9481. Move from trunk to release 2.1.0 section

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1489261 13f79535-47bb-0310-9956-ffa450edef68
YARN-757. Changed TestRMRestart to use the default scheduler to avoid test failures. Contributed by Bikas Saha.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1489268 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5283. Over 10 different tests have near identical implementations of AppContext. Committed by Sandy Ryza


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1489271 13f79535-47bb-0310-9956-ffa450edef68
YARN-635. Renamed YarnRemoteException to YarnException. Contributed by Siddharth Seth.
MAPREDUCE-5301. Updated MR code to work with YARN-635 changes of renaming YarnRemoteException to YarnException. Contributed by Siddharth Seth


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1489283 13f79535-47bb-0310-9956-ffa450edef68
YARN-635 and MAPREDUCE-5301. Bug fix as the committed patch ended up being stale.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1489287 13f79535-47bb-0310-9956-ffa450edef68
YARN-756. Move Preemption* records to yarn.api where they really belong. Contributed by Jian He.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1489290 13f79535-47bb-0310-9956-ffa450edef68
YARN-755. Renamed AllocateResponse.reboot to AllocateResponse.resync. Contributed by Bikas Saha.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1489295 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'apache/trunk' into MAPREDUCE-5203
Complete the tests.