lxd/instance/drivers/driver/qemu: Handle hotplugging NICs by using d.deviceAttachNIC from deviceStart
lxd/instance/drivers/driver/qemu: Handle hotplugging NICs by using d.deviceAttachNIC from deviceStart

Signed-off-by: Thomas Parrott <6b778ce645fb0e3dde76d79eccad490955b1ae74@canonical.com>

stgraber/lxd,lxc/lxd,stgraber/lxd,atxwebs/lxd,lxc/lxd,lxc/lxd,atxwebs/lxd,stgraber/lxd,stgraber/lxd,lxc/lxd,hallyn/lxd,stgraber/lxd,hallyn/lxd,stgraber/lxd,lxc/lxd,atxwebs/lxd,atxwebs/lxd,hallyn/lxd,hallyn/lxd,lxc/lxd,stgraber/lxd,hallyn/lxd,hallyn/lxd,lxc/lxd