'Delete an attachment.
Disconnects/Deletes the specified attachment, returns a list of any
known shared attachment-id\'s for the effected backend device.
returns: A summary list of any attachments sharing this connection'

@wsgi.Controller.api_version(API_VERSION)
def delete(self, req, id):

    context = req.environ['cinder.context']
    attachment = objects.VolumeAttachment.get_by_id(context, id)
    attachments = self.volume_api.attachment_delete(context, attachment)
    return attachment_views.ViewBuilder.list(attachments)
