Mention virt-builder examples in "Tool support for image creation" chapter

[Kashyap Chamarthy]

About `virt-builder`: "Virt-builder is a tool for quickly building new virtual machines. You can build a variety of VMs for local or cloud use, usually within a few minutes or less. Virt-builder also has many ways to customize these VMs. Everything is run from the command line and nothing requires root privileges, so automation and scripting is simple." -- http://libguestfs.org/virt-builder.1.html

Mention this in "Tool support for image creation" section: http://docs.openstack.org/image-guide/content/ch_creating_images_automatically.html

An example:

(1) Create a Fedora qcow2 image:

    $ virt-builder fedora-20 -o f20vm1.qcow2 --format qcow2 \
        --update --selinux-relabel --size 30G

(2) Import it into libvirt (so it can be accessed via `virt-manager` and
    `virsh`):

    $ sudo virt-install --name f20vm --ram 2048 \
        --disk path=/home/kashyap/fedora-20.qcow2,format=qcow2 --import

[Gauvain Pocentek (gpocentek)]

This will be a nice addition, thanks for taking care of this Deepti.

[Tom Fifield (fifieldt)]

Hi Deepti, any news on this one?

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/260868

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/260868
Committed: https://git.openstack.org/cgit/openstack/openstack-manuals/commit/?id=2f1620870bbf019081fef6a5d43805133a88a1bd
Submitter: Jenkins
Branch: master

commit 2f1620870bbf019081fef6a5d43805133a88a1bd
Author: KATO Tomoyuki <email address hidden>
Date: Wed Dec 23 11:57:48 2015 +0900

    [image-guide] Add virt-builder as image tool

    Change-Id: Icb9af4c9c77ee14e6455b3a86af2c84675e5762c
    Closes-Bug: #1384099

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/openstack-manuals 15.0.0 release.