Allow to override database adapter options in params.adapter

[daffl]

Similar to how the database adapters already allow paginate: false the adapters should allow the possibility to pass additional adapter options as params.adapter.

Specifically:

• params.adapter.paginate - Same as params.paginate but recommended to use from now on
• params.adapter.multi - To override the multi option e.g. for internal calls. This is especially useful for tests and seed files.
• params.adapter.allow - To temporarily allow additional query $ operators
• params.adapter.Model - To use a different model for a request if the adapter supports a model