[pyramid] Retrieve user's groups using a custom RQL instead of user's groups property
With cubicweb 3.24, user.groups is set lazily and so retrieving it at this point
will cause a traceback because the connection is not yet entered.
Also, user doesn't accept anymore groups and properties arguments.
Document: cubicweb-doc
Title: CubicWeb documentation
Author: Logilab
Abstract: Some base documentation for CubicWeb users and developpers
Section: Apps/Programming
Format: HTML
Index: /usr/share/doc/cubicweb-documentation/html/index.html
Files: /usr/share/doc/cubicweb-documentation/html/*