Add `img_hide_hypervisor_id` image property

[OpenStack Infra]

https://review.openstack.org/459753
Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.
Your project "openstack/nova" is set up so that we directly report the documentation bugs against it. If this needs changing, the docimpact-group option needs to be added for the project. You can ask the OpenStack infra team (#openstack-infra on freenode) for help if you need to.

commit c7c08e590eb0ea2452a1a1d925297ba43fa609b0
Author: Daniel Pawlik <email address hidden>
Date: Tue Apr 25 15:12:29 2017 +0000

    Add `img_hide_hypervisor_id` image property

    Image hide_hypervisor_id property helps libvirt set an xml instance file
    property, which will hide on guest host KVM hypervisor signature
    ("KVMKVMKVM\0\0\0").
    According to the commit message in QEMU repository [1]:

    "The latest Nvidia driver (337.88) specifically checks
    for KVM as the hypervisor and reports Code 43 for the
    driver in a Windows guest when found. Removing or
    changing the KVM signature is sufficient for the driver
    to load and work."

    DocImpact: New feature ``img_hide_hypervisor_id`` image property should be
    added in the glance-property-keys page of the cli-reference docs [2].

    [1]: http://git.qemu.org/?p=qemu.git;a=commitdiff;h=f522d2a
    [2]: https://docs.openstack.org/cli-reference/glance-property-keys.html

    Implements: blueprint add-kvm-hidden-feature

    Co-Authored-By: Adam Kijak <email address hidden>

    Change-Id: Ie8227fececa40e502aaa39d77de2a1cd0cd72682

[Matt Riedemann (mriedem)]

https://docs.openstack.org/cli-reference/glance-property-keys.html should be updated with the new image metadata property.

[Brian Rosmaita (brian-rosmaita)]

current location of the page to be updated: https://docs.openstack.org/python-glanceclient/latest/cli/property-keys.html

[Brian Rosmaita (brian-rosmaita)]

https://review.openstack.org/513601

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/python-glanceclient 2.9.0 release.