Remove unrestricted "read" access. To make code internally using `ir.model`
work, add a private method `_get` on `ir.model` to retrieve the record
corresponding to a model name, without access rights issue.
Change signature of method `get_authorized_fields` to make it use a model name
instead of a model id. This removes the necessity of a search on `ir.model`.
Raphael Collet
5d746d0ac6