HADOOP-9470. eliminate duplicate FQN tests in different Hadoop modules (Ivan A. Veselovsky via daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1530671 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c  1530669 merging from trunk to branch-2 to fix HDFS-4510.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1530672 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1530683 FIXES: MAPREDUCE-5569. FloatSplitter is not generating correct splits. Contributed by Nathan Roberts


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1530684 13f79535-47bb-0310-9956-ffa450edef68