Add split value implementation done, tested.
Merge remote-tracking branch 'origin/zjw' into v0.2, OK
Merge remote-tracking branch 'origin/zhuqihan' into v0.2, OK
Test user authentication and privilege authorization.
modify objectstore
Merge zjw's branch for nodegroup/globalschema related implementations.
Merge remote-tracking branch 'origin/caoruyi' into macan, OK
modify nodeGroup
add showNodeGroup method
add log message
add/drop/show nodeGroupAssignment
Add sesssion tracking to Thrift server: keep track of the authenticated user info.
rpc node,nodegroup,role,user operate one
add/drop/show role and user
merge with zjw
merge with zjw add new file nohup.out
rpc node,nodegroup,role,user operate two
Merge remote-tracking branch 'origin/zjw' into zhuqihan
merge with zjw to solve parseDriver mistake
modify hive.g