debian-guestfs: disable systemd-networkd-wait-online.service

This service is brain-dead for CI bringups, it keeps failing
because we are re-configuring the networking outside of what
systemd likes and it will wait forever hoping we will try abide.
We already try hard to disable it, but its not enough, just
disable the service at virt-builder guest image provisioning
to completely remove it from our lives.

Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

Author: mcgrof

scripts/bringup_guestfs.sh

@@ -219,6 +219,7 @@ mkdir /etc/network/interfaces.d/
 append-line /etc/network/interfaces.d/enp1s0:auto enp1s0
 append-line /etc/network/interfaces.d/enp1s0:allow-hotplug enp1s0
 append-line /etc/network/interfaces.d/enp1s0:iface enp1s0 inet dhcp
+firstboot-command systemctl disable systemd-networkd-wait-online.service
 firstboot-command systemctl stop ssh
 firstboot-command DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true dpkg-reconfigure -p low --force openssh-server
 firstboot-command systemctl start ssh