Based on the Libvirt and QEMU versions, two traits,
COMPUTE_ADDRESS_SPACE_PASSTHROUGH and COMPUTE_ADDRESS_SPACE_EMULATED,
are controlled. Since the two are supported from the same version on
the Libvirt and QEMU, Nova handles them in the same way.
Blueprint: libvirt-maxphysaddr-support
Depends-On: https://review.opendev.org/c/openstack/os-traits/+/871226
Signed-off-by: Nobuhiro MIKI <nmiki@yahoo-corp.jp>
Change-Id: If6c7169b7b8f43ad15a8992831824fb546e85aab