MAPREDUCE-5933. Enabled MR AM to post history events to the timeline server. Contributed by Robert Kanter.

(cherry picked from commit 6b2f11b54bc679b0715fe66bd129e340e8c61c5c)
MAPREDUCE-6018. Added an MR specific config to enable emitting job history data to the timeline server. Contributed by Robert Kanter.

(cherry picked from commit 971e91c8c03a23e4613ed3f071b4f982ee5a1b63)
HADOOP-11233. hadoop.security.kms.client.encrypted.key.cache.expiry property spelled wrong in core-default. (Stephen Chu via yliu)
HDFS-6741. Improve permission denied message when FSPermissionChecker#checkOwner fails. Contributed by Stephen Chu and Harsh J. (harsh)