'Wrapper utility that returns a test network.'

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

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