Missing extension documentation for os-volume_attachments

[Anne Gentle]

/servers/{server_id}/os-volume_attachments

body looks like:

{
    'volumeAttachment':
        {
            'volumeId': volume_id,
            'device': device
}}

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/6945

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/6945
Committed: http://github.com/openstack/openstack-manuals/commit/53b9c62c8154f58b3a42f739c3541b543c419f13
Submitter: Jenkins
Branch: master

commit 53b9c62c8154f58b3a42f739c3541b543c419f13
Author: Diane Fleming <email address hidden>
Date: Mon Apr 30 16:04:08 2012 -0500

    bug 987945 - add os-volume_attachments resource
    moved os-volume_attachments calls to separate ext file os-volume_attachments.wadl

    moved the os-volume_attachments call from the bottom of the page to the extensions as a section rather than chapter

    Change-Id: Iaeb588ff3c7b2e728d19b56367453e6e1852b2bf