svn merge -c 1427762 from branch-1 for HDFS-4337. Backport HDFS-4240: For nodegroup-aware block placement, when a node is excluded, the nodes in the same nodegroup should also be excluded.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1-win@1427767 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9174. Merge change 1428102 from branch-1

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1-win@1428103 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9175. Merge change 1428105 from branch-1

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1-win@1428106 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-4909. Merge r1428620 from branch-1 to branch-1-win

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1-win@1428623 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4355. Merging change r1428631 from branch-1

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1-win@1428633 13f79535-47bb-0310-9956-ffa450edef68