def list_md5_hashes(self, vsm_ip=None):
        return self._get(self.md5_path, vsm_ip=vsm_ip)
normalize JSON reference, also fix
dataset/ETHPy150Open openstack/networking-cisco/networking_cisco/plugins/ml2/drivers/cisco/n1kv/n1kv_client.py/Client.list_md5_hashes--crossover with--dataset/ETHPy150Open mission-liao/pyswagger/pyswagger/utils.py/normalize_jr