add list schema
modify the metastore rpc of equiproom and geolocation
rpc of equiproom and geolocation and nodeassignment
Add all unimplemented RPC interfaces: change some user authentication/authorization related codes.
Merge zjw's branch{for other RPC definations}, and fix conflicts.
new nodeAssignment operation
new nodeAssignment operation
Merge zjw's branch: for GlobalSchema modifications
Merge caoruyi's branch: for node assignment.
Merge remote-tracking branch 'origin/zhuqihan' into v0.2, ddl for nodegroup related
Add SOTAuthenticator, UserAuthorityCheck PreEventContext, and default PreEventListener.
Merge remote-tracking branch 'origin/v0.2' into zjw