'Kill (cancel) a Qubole commmand
:param ti: Task Instance of the dag, used to determine the Quboles command id
:return: response from Qubole'

def kill(self, ti):

    if (self.cmd is None):
        cmd_id = ti.xcom_pull(key='qbol_cmd_id', task_ids=ti.task_id)
        self.cmd = self.cls.find(cmd_id)
    if (self.cls and self.cmd):
        logging.info('Sending    KILL    signal    to    Qubole    Command    Id:    %s', self.cmd.id)
        self.cmd.cancel()
