Merge -r 1487092:1487093 from trunk onto branch-2. Fixes HDFS-4827.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1487099 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1456212 FIXES: HADOOP-9397. Incremental dist tar build fails. Contributed by Chris Nauroth


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1487117 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5270. Migrated MR app from using BuilderUtil factory methods to individual record factory methods. Contributed by Jian He.
svn merge --ignore-ancestry -c 1486271 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1487158 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-MAPREDUCE-4884-branch-2-gd