'Lists all metadata for a server.
For a full list of available parameters, please refer to the official
API reference:
https://developer.openstack.org/api-ref/compute/#list-all-metadata'

def list_server_metadata(self, server_id):

    (resp, body) = self.get(('servers/%s/metadata' % server_id))
    body = json.loads(body)
    self.validate_response(schema.list_server_metadata, resp, body)
    return rest_client.ResponseBody(resp, body)
