MAPREDUCE-4969. Merge change 1441078 from branch-1

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1-win@1441079 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9250. Windows installer bugfixes. Contributed by Ivan Mitic.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1-win@1452668 13f79535-47bb-0310-9956-ffa450edef68