NetworkDriverEntities: NetworkIpDataEntity.Gateway is optional

 docker_plugin_api/NetworkDriverEntities.py

@@ -1,5 +1,5 @@
class NetworkIpDataEntity:
    def __init__(self, AddressSpace: str, Pool: str, Gateway: str, AuxAddresses: dict = None):
    def __init__(self, AddressSpace: str, Pool: str, Gateway: str = None, AuxAddresses: dict = None):
        if AuxAddresses is None:
            AuxAddresses = {}