svn merge -c 1471424 FIXES: MAPREDUCE-5069. add concrete common implementations of CombineFileInputFormat (Sangjin Lee via bobby)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1471429 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4129. Merge r1403956 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1471433 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4124. Merge r1403304 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1471500 13f79535-47bb-0310-9956-ffa450edef68
Remove duplicate HDFS-4112 entries in CHANGES.txt

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1471503 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4152. Merge r1406326 from trunk

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HDFS-4206. Merge change r1410996 from trunk

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HDFS-4215. Merge r1411947 from trunk.

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Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-MAPREDUCE-4884-branch-2-gd