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added tesst for Tokenizer and Search to get them under full coverage. relatex refactorings and coverage reports

added tests to get complete coverage of Transaction, RawSQL, AuditLog and Query/Having. Related refactorings. Added some getters to be able to test. Also added coverage report for these changes

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New fix for the check for duplicates between explicitly declared custom relations and autogenerated relations.

fixed code so those problems wont occure. However the method still not works as intended, 
more information see mail at doctrine-dev mailinglist.
Fixed same Problems in other drivers aswell.

Added to autoloading to support caching the loaded model paths so we can retrieve them with autoload.

to prevent unexpected behaviour during usage 
of preHydrate/postHydrate hooks.

refetch state after preSave listener in unit of work. if state changes in preSave listener it is not taken into concideration when an object is saved/deleted etc. also fixed some small stuff in tests and added new coverage report