In Folder_delete, use portal_categories.getRelatedPropertyList(property_name='relative_url') instead of [related_object.getRelativeUrl() for related_object in portal_categories.getRelatedValueList()] to prevent Unauthorized that may happen while getting attribute from related_object in restricted environment.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@23743 20353a03-c40f-0410-a6d1-a30d3c3de9de