'List image members.
For a full list of available parameters, please refer to the official
API reference:
http://developer.openstack.org/api-ref/image/v2/#list-image-members'

def list_image_members(self, image_id):

    url = ('images/%s/members' % image_id)
    (resp, body) = self.get(url)
    self.expected_success(200, resp.status)
    body = json.loads(body)
    return rest_client.ResponseBody(resp, body)
