Return an neutron client.

    @param api_version: only 2.0 is supported now

def Client(api_version, *args, **kwargs):
    """Return an neutron client.

    @param api_version: only 2.0 is supported now
    """
    neutron_client = utils.get_client_class(
        API_NAME,
        api_version,
        API_VERSIONS,
    )
    return neutron_client(*args, **kwargs)