Refine the code according to Anoop's patch.
Refine the code according to Anoop's patch.
Refine the code according to Anoop's patch.
Add the MobStoreEngine.
Fix the issues in the HStore.
refine the test code.
Merge remote-tracking branch 'origin/hbase-11339-core' into hbase-11339-metrics

Conflicts:
	hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HMobStore.java