[FIX] res.users: prevent exporting the virtual "Access Rights" fields

A corresponding patch on openerp-web takes that
new field attribute into account.

bzr revid: odo@openerp.com-20130607093057-nujdeq39sqbx2cbo

openerp/addons/base/res/res_users.py

@@ -825,6 +825,7 @@ class users_view(osv.osv):
                     'string': app and app.name or _('Other'),
                     'selection': [(False, '')] + [(g.id, g.name) for g in gs],
                     'help': '\n'.join(tips),
+                    'exportable': False,
                 }
             else:
                 # boolean group fields
@@ -833,6 +834,7 @@ class users_view(osv.osv):
                         'type': 'boolean',
                         'string': g.name,
                         'help': g.comment,
+                        'exportable': False,
                     }
         return res