'Wrapper utility that returns a test network.'

@classmethod
def create_network(cls, network_name=None, **kwargs):

    network_name = (network_name or data_utils.rand_name((cls.__name__ + '-test-network')))
    body = cls.networks_client.create_network(name=network_name, **kwargs)
    network = body['network']
    cls.networks.append(network)
    return network
