WL#2764: General Table Locking support for MySQL Cluster

Status: Un-Assigned

This WL entry is about adding full support for table locking in MySQL Cluster,
both to support the command LOCK TABLES as well as all meta-data queries.

-- Jonas
See 
https://intranet.mysql.com/worklog/NDB-RawIdeaBin/?tid=2788 for alternative
proposal for mysqld table locks for ndbd