Modified identity function to work with joined inheritance tables.
Added regression tests
Fix typo in test name
Merge pull request #691 from 51systems/master

IDENTITY function fix for Joined Inheritance
DDC-2489 Added missing semicolon when dump-sql on schema update.
DDC-2476 Better approach for reverse engineer. Some refactoring done to driver.
DDC-2476 Commented check under PostgreSQL.
Fix DDC-2494
small optimization
drop useless support for associations