YARN-1137. Add support whitelist for system users to Yarn container-executor.c. (rvs via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1523589 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9961. versions of a few transitive dependencies diverged between hadoop subprojects. (rvs via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1523597 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9962. in order to avoid dependency divergence within Hadoop itself lets enable DependencyConvergence. (rvs via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1523600 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5379. Include token tracking ids in jobconf. (kkambatl via tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1523607 13f79535-47bb-0310-9956-ffa450edef68
Merge -c 1523652 from trunk to branch-2 to fix YARN-1170. YARN & MapReduce proto definitions fixed to specify protobuf package as hadoop.yarn and hadoop.mapreduce respectively. Contributed by Binglin Chang.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1523653 13f79535-47bb-0310-9956-ffa450edef68
Merge -c 1523660 from trunk to branch-2 to fix MAPREDUCE-5493. Cleanup in-memory & on-disk segments to prevent leak on shuffle completion. Contributed by Jason Lowe.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1523661 13f79535-47bb-0310-9956-ffa450edef68