Arthur Lutz <arthur.lutz@logilab.fr> [Wed, 10 Feb 2016 14:43:05 +0100] rev 11103
[exceptions] fix string conversion for Unauthorized exception
changeset 3cb87b61b067 changed CubicWebException to define __unicode__
as the main entry point for string conversion, but left Unauthorized's
__str__ definition unchanged, leading to a mismatch. Closes #10646396.