[BUG][Core] ChunJun can not find class of connector.

**Describe the bug**
Use 'chunjunDistDir' replace 'flinkxDistDir', then task failed with ClassNotFoundException.

<img width="1349" alt="image" src="https://user-images.githubusercontent.com/35768015/169467555-4c590bf9-6e17-4ecd-ba28-6e9b13a6a402.png">

<img width="723" alt="image" src="https://user-images.githubusercontent.com/35768015/169467594-2a4259b7-065d-4b12-b36d-f19131e1edab.png">

