Fetch child nodes for a given Zookeeper path.

def _get_zk_path_children(self, zk_conn, zk_path, name_for_error):
        """Fetch child nodes for a given Zookeeper path."""
        children = []
        try:
            children = zk_conn.get_children(zk_path)
        except NoNodeError:
            self.log.info('No zookeeper node at %s', zk_path)
        except Exception:
            self.log.exception('Could not read %s from %s', name_for_error, zk_path)
        return children