MAPREDUCE-5827. TestSpeculativeExecutionWithMRApp fails. Contributed by Zhijie Shen.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1589223 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5827. Move attribution from 2.5.0 to 2.4.1 in CHANGES.txt.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1589238 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5833. TestRMContainerAllocator fails ocassionally. Contributed by Zhijie Shen.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1589248 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10503. Move junit up to v 4.11. Contributed by Chris Nauroth.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1589273 13f79535-47bb-0310-9956-ffa450edef68