server DVD: include Server environment, remove others
the Server environment itself is not actually included in F24
and Rawhide Server DVDs ATM, only 'Infrastructure Server' and
'Web Server' show up in the environment list. This lists the
Server environment and removes the other two, which we don't
want to make available as environments for Fedora Server.
Signed-off-by: Adam Williamson <awilliam@redhat.com>