Fixed test:prepare params for Postgresql

I don't know if anyone has run the tests, but I'm unable to pass the preparations. The tables are duplicated in each schema, they have multiple primary keys which are not included in foreign keys... Even after fixing the schemas, I receive fatal:
``
Propel\Generator\Exception\EngineException: Table "book" declared twice
``
Merge pull request #415 from auss/patch-1

Fixed test:prepare params for Postgresql