svn merge -c 1573604 merging from trunk to branch-2 to fix:HADOOP-10314. The ls command help still shows outdated 0.16 format. Contributed by Rushabh S Shah.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1573605 13f79535-47bb-0310-9956-ffa450edef68
Merge r1573694 from trunk.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1573696 13f79535-47bb-0310-9956-ffa450edef68
YARN-1758. Fixed ResourceManager to not mandate the presence of site specific configuration files and thus fix failures in downstream tests. Contributed by Xuan Gong.
svn merge --ignore-ancestry -c 1573695 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1573697 13f79535-47bb-0310-9956-ffa450edef68
YARN-1704. Modified LICENSE and NOTICE files to reflect newly used levelDB related libraries. Contributed by Billie Rinaldi.
svn merge --ignore-ancestry -c 1573702 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1573704 13f79535-47bb-0310-9956-ffa450edef68
YARN-1765. Added test cases to verify that killApplication API works across ResourceManager failover. Contributed by Xuan Gong.
svn merge --ignore-ancestry -c 1573735 ../../trunk/
svn merge --ignore-ancestry -c 1573736 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1573737 13f79535-47bb-0310-9956-ffa450edef68