svn merge -c 1570252 meging from trunk to branch-2 to fix:HDFS-5962. Mtime and atime are not persisted for symbolic links.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1570255 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10348. Deprecate hadoop.ssl.configuration in branch-2, and remove it in trunk. Contributed by Haohui Mai.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1570297 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10328. Merging change r1570304 from trunk to branch-2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1570305 13f79535-47bb-0310-9956-ffa450edef68
YARN-1736. FS: AppSchedulable.assignContainer's priority argument is redundant. (Naren Koneru via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1570337 13f79535-47bb-0310-9956-ffa450edef68