On systemd systems, so everything except ubuntu-trusty. Set --no-dns
because we run a local unbound service and never want to use clouds
DNS servers.
Change-Id: I88c0c6aecfd026d32f3bab17e20e81f4201092d4
Depends-On: I0cfd83ab4208e3a35d7674c5fc34cd209d340074
Signed-off-by: Paul Belanger <pabelanger@redhat.com>