refine the test code.
Change to the md5 instead of checksum of the start key.
Merge branch 'hbase-11339-core' of https://github.com/JingchengDu/hbase into hbase-11339-core
Fix the issue in MobFileName.
Fix the issue in the MobFileName.java
Fix the issue in ut.
Fix the issue in Ut.
Refine the code.
Refine the comments.
Refine the code.
Merge remote-tracking branch 'origin/hbase-11339-core' into hbase-11339-metrics