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>