Merge "Setup cert device in test script" am: e44954a0 am: a4ef8687

            resolved_cmd.append(replace_vars(entry, config))

        devices.append(

            GdCertDevice(config["grpc_port"], config["grpc_root_server_port"],

                         config["signal_port"], resolved_cmd, config["label"]))

                         config["signal_port"], resolved_cmd, config["label"],

                         config.get("serial_number", "")))

    return devices

class GdCertDevice(GdDeviceBase):

    def __init__(self, grpc_port, grpc_root_server_port, signal_port, cmd,

                 label):

                 label, serial_number):

        super().__init__(grpc_port, grpc_root_server_port, signal_port, cmd,

                         label, ACTS_CONTROLLER_CONFIG_NAME)

                         label, ACTS_CONTROLLER_CONFIG_NAME, serial_number)

        # Cert stubs

        self.rootservice = cert_rootservice_pb2_grpc.RootCertStub(