Fix the issues in JIRA build
Fix the NPE in DefaultMobCompactor.java
Merge branch 'hbase-11339-metrics' of https://github.com/JingchengDu/hbase into hbase-11339-metrics
Merge remote-tracking branch 'origin/hbase-11339-core' into hbase-11339-core-compaction
Merge remote-tracking branch 'origin/hbase-11339-core-compaction' into hbase-11339-metrics
Merge remote-tracking branch 'origin/hbase-11339-metrics' into hbase-11339-all