Merge -r 1448596:1448597 from trunk to branch-2. Fixes: MAPREDUCE-4846. Some JobQueueInfo methods are public in MR1 but protected in MR2. Contributed by Sandy Ryza.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1448598 13f79535-47bb-0310-9956-ffa450edef68