trivial: Clarify purpose of 'Host.supports_*' properties
trivial: Clarify purpose of 'Host.supports_*' properties

These are generic properties to be used for trait generation. They
should not be relied on for booting guests.

Change-Id: If527593ced072681130f97810fd839dfcda6a45d
Blueprint: allow-secure-boot-for-qemu-kvm-guests
Signed-off-by: Stephen Finucane <4725dc7f3632bf126d9fbdc30c347e91e8d2fe16@redhat.com>

openstack/nova,openstack/nova,mahak/nova,openstack/nova,mahak/nova,mahak/nova