YARN-2544. Added admin-API objects for using node-labels. Contributed by Wangda Tan.

(cherry picked from commit 596702a02501e9cb09aabced168027189eaf02ba)
HADOOP-11184. Update Hadoop's lz4 to r123 (cmccabe)
(cherry picked from commit d8d628d1e0c42a32e2079ed430e8817996bbe4c4)
YARN-2180. [YARN-1492] In-memory backing store for cache manager. (Chris Trezzo via kasha)

(cherry picked from commit 4f426fe2232ed90d8fdf8619fbdeae28d788b5c8)
YARN-2617. Fixed ApplicationSubmissionContext to still set resource for backward compatibility. Contributed by Wangda Tan.

(cherry picked from commit e532ed8faa8db4b008a5b8d3f82b48a1b314fa6c)
HDFS-7026. Introduce a string constant for "Failed to obtain user group info...". Contributed by Yongjun Zhang.
(cherry picked from commit cbd21fd13b321d042faeff00fa71c9becc0d6087)