WebSession: table lock workaround for MySQL-5.5
- Fixes user merge facility by implementing a nasty work-around for MySQL-5.5 DDL lock issue that may happen when client code ask to lock some tables. When MySQL-5.5 or higher is used, the user merge facility will simply not ask for locking and will warn the administrator of this problem. Huh!
Co-authored-by: Tibor Simko <tibor.simko@cern.ch>