Tornado

[Bug] [mysqlcdc] 运行mysqlcdc脚本报错

5

### Search before asking - [X] I had searched in the [issues](https://github.com/DTStack/chunjun/issues) and found no similar issues. ### What happened flink 版本是 1.12.7，chunjun 是 chunjun-1.12_release 分支最新代码  Standalone 模式下运行 mysqlcdc...

### Search before asking - [X] I had searched in the [issues](https://github.com/DTStack/chunjun/issues) and found no similar question. - [X] I had googled my question but i didn't get any help....

### Search before asking - [X] I had searched in the [issues](https://github.com/DTStack/Taier/issues) and found no similar issues. ### What happened **1.4.0 版本** ### 场景一 同步任务向导模式，配置了系统变量，点击转化成脚本模式报异常 ---  ### 场景二 同步任务脚本模式，脚本中存在系统变量，任务保存失败...