Adjust pagure rules for new message format.
    
    @bex mentioned that the pagure badges were broken.  It seems like the pagure
    message format may have changed at some point in the past, and these rules were
    never updated to match the new format.
    
    See an example message here:
    https://apps.fedoraproject.org/datagrepper/id?id=2017-9c6f4d9f-577e-4347-829f-9952cd4b4ff3&is_raw=true&size=extra-large