Server: match the contents of the DVD
    
    For some reason, the DVD is being produced with all of the content
    from this compose, rather than the smaller subset listed in
    fedora-disk-server-kickstart.ks, so we should reduce this compose
    to match the intended contents of the DVD. Network-enabled
    installations will still use the Everything repo.
    
    Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>