[Form] Update MongoDBQueryBuilderLoader for bridge interface
[Form] Update MongoDBQueryBuilderLoader for bridge interface

This implements an additional interface method introduced in symfony/symfony#3156.

malarzm/DoctrineMongoDBBundle,juchi/DoctrineMongoDBBundle,alcaeus/DoctrineMongoDBBundle,sarcher/DoctrineMongoDBBundle,0mars/DoctrineMongoDBBundle,Soullivaneuh/DoctrineMongoDBBundle,castarco/DoctrineMongoDBBundle,tomasbro/DoctrineMongoDBBundle,tomasbro/DoctrineMongoDBBundle,stof/DoctrineMongoDBBundle,jahller/DoctrineMongoDBBundle,Soullivaneuh/DoctrineMongoDBBundle,alcaeus/DoctrineMongoDBBundle,doctrine/DoctrineMongoDBBundle,juchi/DoctrineMongoDBBundle,0mars/DoctrineMongoDBBundle,jahller/DoctrineMongoDBBundle,malarzm/DoctrineMongoDBBundle,castarco/DoctrineMongoDBBundle