YARN-2671. Fix the Jira number in the change log.

(cherry picked from commit 5b12df6587eb4f37d09c9ffc35a0ea59694df831)
MAPREDUCE-6122. TestLineRecordReader may fail due to test data files checked out of git with incorrect line endings. Contributed by Chris Nauroth.

(cherry picked from commit 684170d5efdc11bcd9967168f44a428d1a72af3c)
MAPREDUCE-6122. Fix CHANGES.txt.

(cherry picked from commit 2f0166db560b180e8d07c10ba9ad4bfaf2aa7b36)
MAPREDUCE-6123. TestCombineFileInputFormat incorrectly starts 2 MiniDFSCluster instances. Contributed by Chris Nauroth.

(cherry picked from commit 777877d079ecb025c293deac741800800e413179)
YARN-2662. TestCgroupsLCEResourcesHandler leaks file descriptors. Contributed by Chris Nauroth.

(cherry picked from commit d3afd730acfa380ab5032be5ee296c5d73744518)
YARN-2583. Modified AggregatedLogDeletionService to be able to delete rolling aggregated logs. Contributed by Xuan Gong.

(cherry picked from commit cb81bac0029fce3a9726df3523f0b692cd3375b8)