ArticlePkg: tickets and attempts are displayed as list of resource uri
Tickets: comments as a list of {author, message, date}.
Changed add_meta to format_response. Because it formats the response: adding resource uri, but only if there is a list of objects, it also adds meta.
Changed content of add_resource_uri. Previously it added resouces uri to one object or to a list of objects, but now it adds resources uri to an object.
Adjustments in test_renderer