divided some assertions in various cohesive methods and renamed method names to conform to agile documentation (affects #2316)

[2.0] New Annotation API work: Simplifications, changed namespace separator to match the one of PHP, adjusted Lexer to swallow any * characters outside of a string value to be more forgiving when it comes to formatting.

[2.0] Moved cache drivers to Common package. Added new annotation parser implementation to Common package. AnnotationDriver in ORM not yet migrated.

[2.0] Fixed issue with self-referential one-to-many associations not being persisted correctly when IDENTITY key generation was used. Included now passing OneToManySelfReferentialTest.

[2.0] Implemented DQL bulk UPDATE support for Class Table Inheritance. Corrections to MultiTableDeleteExecutor and SqlWalker. DQL bulk UPDATE support not yet fully complete.

[2.0] Implemented DQL bulk DELETE support for Class Table Inheritance. Other cleanups, refactorings and docblock additions.