HDFS-5882. TestAuditLogs is flaky (jxiang via cmccabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1565840 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5900. Cannot set cache pool limit of unlimited via CacheAdmin. Contributed by Andrew Wang.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1565841 13f79535-47bb-0310-9956-ffa450edef68
YARN-1672. YarnConfiguration is missing a default for yarn.nodemanager.log.retain-seconds (Naren Koneru via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1565866 13f79535-47bb-0310-9956-ffa450edef68
YARN-1635. Implemented a Leveldb based ApplicationTimelineStore. Contributed by Billie Rinaldi.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1565868 13f79535-47bb-0310-9956-ffa450edef68