Revert "[FN VMs] remove graphics"

Revert "[FN VMs] remove graphics"

RHEL family virtualization tools reserve 02:00 PCI slot for VGA, even
if 'nographics' is specified when creating the VM (in case the user
wants to later hook a video card, which usually *requires* PCI slot2).

Debian systems do not follow this rule (tested with libvirt 1.x, 2.x,
3.x), hence 1st NIC lands on PCI slot 2 (and get eth name 'ens2').

To align the behavior across all possible jumpserver distros, bring
back the virtio video.

This reverts commit 738f6c3b68d1179de1ff790f9e72c25f10874da4.

Change-Id: Ifd855c12e04aec1ff0ab047b13f8081365741889
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>