DATAMONGO-420 - Improve support of quote handling for custom query parameters.

We now allow the users to specify whether a given query or fields value is already quoted. This enables the user to specify complete query parts via String parameters.
would it make sense to have those `boolean`s hidden in `MongoQueryMethod` so that we could just call `method.isCustomQuotedQuery()` or `method.isCustomQuotedFields`?