grizzly: glance hw_ namespace for hardware properties

[Tom Fifield]

https://review.openstack.org/#/c/23081/ change the way some metadata items in glance look. Now hardware items have a hw_ in front of them>

This updates the libvirt driver to use a 'hw_' prefix on
the names of hardware config properties it looks up for
glance images. Thus the new syntax for setting custom
hardware properties is

# glance image-update \
--property hw_disk_bus=ide \
--property hw_cdrom_bus=ide \
--property hw_vif_model=e1000 \
f16-x86_64-openstack-sda

There is no back-compat support for the previous 'disk_bus',
'cdrom_bus' and 'vif_model' names, since they were never
made available in any formal release, only development
snapshots.

[Tom Fifield (fifieldt)]

https://review.openstack.org/24049

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/24049

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/24049
Committed: http://github.com/openstack/openstack-manuals/commit/5dd0759f0f15318c1f4a01e472c25663240369c4
Submitter: Jenkins
Branch: master

commit 5dd0759f0f15318c1f4a01e472c25663240369c4
Author: Tom Fifield <email address hidden>
Date: Mon Mar 11 21:24:04 2013 +1100

    Doc glance hw_ namespace for hardware properties

    fixes bug 1153470

    As noted in the bug report, glance hardware properties now use
    'hw_' as a namespace. There was only one reference to this in
    the docs, which this patch updates.

    Change-Id: I7af8f5f602c8b7752acd50c7b152a1dedeb1b615