[2.0] DDC-84 - Added increment alter table / update schema tests for Oracle Platform - Fixed a simple bug in Postgres Tests.

[2.0] DDC-84 - Added increment alter table / update schema tests for Postgres Platform - Fixed several bugs in Doctrine\DBAL\Platforms\PostgreSqlPlatform

[2.0] DDC-84 - Add Mysql Platform unittests for incremental changes of the metadata for the schematool update function. Fixed some quirks in the Unit-Test suite alongside, Fixed changes of length in SchemaTool update.

[2.0] Moved locking tests into Functional namespace. Fixed several missing flush() calls in some functional association tests. Reordered DELETE statements for ecommerce model tests in OrmFunctionalTestCase in order to maintain referential integrity. Fixed issue with bi-directional self-referencing one-one associations. Some other small improvements and cosmetics. Small hydration performance improvement through inlining method call in UnitOfWork::createEntity().