Sqlite missing features for ResourceStresser

[bpkroth]

sqlite doesn't support

• explicit "lock table"
• sleep operations in its SQL syntax.

The former may possible with a BEGIN EXCLUSIVE TRANSACTION; {stmt}; COMMIT TRANSACTION; style operation, however the substitution logic for expanding the ?? syntax in setSQL() in SQLUtil.java needs fixing.

The sleep logic may be possible by introducing a callback function, but that's specific to the Sqlite driver class which would require some custom code that's only loaded with that profile or reflection to do so dynamically.

See Also: #268 (especially the resourcestresser/ddl-sqlite.sql file for additional links and details).