YARN-913 service registry: YARN-2652 add hadoop-yarn-registry package under hadoop-yarn
HDFS-7203. Concurrent appending to the same file can cause data
corruption. Contributed by Kihwal Lee.
CHANGES.txt: move HADOOP-10404 underneath branch 2.6
HADOOP-10809. hadoop-azure: page blob support. Contributed by Dexter Bradshaw, Mostafa Elhemali, Eric Hanson, and Mike Liddell.
HADOOP-11179. Java untar should handle the case that the file entry comes without its parent directory entry. Contributed by Craig Welch.
YARN-2598 GHS should show N/A instead of null for the inaccessible information  (Zhijie Shen via mayank)
HDFS-7202. Should be able to omit package name of SpanReceiver on "hadoop trace -add" (iwasakims via cmccabe)
HADOOP-11161. Expose close method in KeyProvider to give clients of Provider implementations a hook to release resources. Contribued by Arun Suresh.
HADOOP-11133. Should trim the content of keystore password file for JavaKeyStoreProvider (Yi Liu via umamahesh)
HDFS-7195: code review feedback, updating hadoop-env.sh comments.
Merge branch 'apache-trunk' into HDFS-7195
HDFS-7195: Minor change adding period to end of sentence.
Merge branch 'apache-trunk' into HDFS-7195