MAPREDUCE-1981. Improve getSplits performance by using listLocatedStatus. Contributed by Hairong Kuang and Jason Lowe


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1507385 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch upstream/$:{upbranch}