grizzly: allow disabling file injection completely

[Tom Fifield]

https://review.openstack.org/20691 updates the libvirt_inject_partition option:

    With the libvirt_injection_partition config set to -2,
    file injection is avoided completely.

    This can be required if you want to make user specified files
    available from the metadata server (and config drive is not enabled),
    then you would want to avoid injection completely for performance reasons,
    but also to avoid boot failure if the injection itself failed.

 115 cfg.IntOpt('libvirt_inject_partition',
 116 default=1, 116 default=1,
 117 help='The partition to inject to : ' 117 help='The partition to inject to : '
 118 '-1 => inspect (libguestfs only), 0 => not partitioned, ' 118 '-2 => disable, -1 => inspect (libguestfs only), '
 119 '>0 => partition number'), 119 '0 => not partitioned, >0 => partition number'),

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/22164

[Tom Fifield (fifieldt)]

https://review.openstack.org/22164

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/22164
Committed: http://github.com/openstack/openstack-manuals/commit/0796fadf7f04fbb0c2a6bc7f5a461272f5f832b2
Submitter: Jenkins
Branch: master

commit 0796fadf7f04fbb0c2a6bc7f5a461272f5f832b2
Author: Tom Fifield <email address hidden>
Date: Mon Feb 18 15:17:41 2013 +1100

    Add libvirt_injection_partition option

    fixes bug 1128598

    Grizzly introduced this new option which is used to control injection
    of files in libvirt - adding the option.

    Adding debugging usage in support section for compute.

    Change-Id: I0252bc71e18984861c007296120712140bc31b78