Add junit5 test code for module [linkis-engineconn-plugin-core]

### Add junit5 test code for module [linkis-engineconn-plugin-core]
- Module: linkis-engineconn-plugin-core
- Location:linkis-computation-governance/linkis-engineconn-plugin-core
- Task status:✗(unfinished)/ ✓(finished)
- Test code guide:https://linkis.apache.org/zh-CN/community/how-to-write-unit-test-code/
- Test code example: https://github.com/apache/incubator-linkis/tree/master/linkis-public-enhancements/linkis-publicservice/linkis-jobhistory/src/test
---
- 模块名: linkis-engineconn-plugin-core
- 代码位置:linkis-computation-governance/linkis-engineconn-plugin-core
- 任务状态:✗(unfinished)/ ✓(finished)
- 单测编写指引:https://linkis.apache.org/zh-CN/community/how-to-write-unit-test-code/
- 参考样例: https://github.com/apache/incubator-linkis/tree/master/linkis-public-enhancements/linkis-publicservice/linkis-jobhistory/src/test

| Task status| Class | Type| Level of Difficulty | Note |
| :------ | :------ | :------: | :------: | :------: |
| ✗ |org.apache.linkis.manager.engineplugin.common.conf.*| conf| normal | |
| ✗ |org.apache.linkis.manager.engineplugin.common.creation.*| factory| normal | |
| ✗ |org.apache.linkis.manager.engineplugin.common.exception.*| exception| normal | |
| ✗ |org.apache.linkis.manager.engineplugin.common.launch.process.Environment| Environment| normal | |
| ✗ |org.apache.linkis.manager.engineplugin.common.launch.process.JavaProcessEngineConnLaunchBuilder| build| normal | |
| ✗ |org.apache.linkis.manager.engineplugin.common.loader.conf.PluginLoaderConstant| Constant| normal | |
| ✗ |org.apache.linkis.manager.engineplugin.common.loader.exception.*| exception| normal | |
| ✗ |org.apache.linkis.manager.engineplugin.common.resource.GenericEngineResourceFactory| factory| normal | |