Use wikitcms not mwclient for updatetrackers for now
    
    The code that lets us log into the Fedora wiki is only in
    wikitcms right now, not mwclient. Considering whether it makes
    sense to patch it into mwclient somehow, but for now, let's do
    this.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>