- resolve categories without security restrictions

Categories used on predicate definition of document might be not available
(due to security) for user, but even then they shall be used in predicate.
Thanks to unrestricted resolution of category it is possible to use such
objects in query.

Reviewed by Romain.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@34326 20353a03-c40f-0410-a6d1-a30d3c3de9de