Add modification to disable_referential_integrity back in for PostgreSQL
Add modification to disable_referential_integrity back in for PostgreSQL

 * I'm not sure what circumstances require this modification anymore.  
julianray/spatial_adapter,hashbangnz/spatial_adapter,juniorz/spatial_adapter,jsack777/spatial_adapter,darbyfrey/spatial_adapter,bellycard/spatial_adapter,smedrick/spatial_adapter,pdeffendol/spatial_adapter