Add junit5 test code for module [linkis-application-manager]

### Add junit5 test code for module [linkis-application-manager]
- Module: linkis-application-manager
- Location:linkis-computation-governance/linkis-application-manager
- 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
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- 模块名: linkis-application-manager
- 代码位置:linkis-computation-governance/linkis-application-manager
- 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.am.exception.*| Exception | normal | |
| ✗ |org.apache.linkis.manager.am.restful.*| api | normal | |
| ✗ |org.apache.linkis.manager.am.service.impl.ECResourceInfoServiceImpl| Service | normal | |
| ✗ |org.apache.linkis.manager.am.util.*| Utils | normal | |
| ✗ |org.apache.linkis.manager.am.conf.ConfigurationMapCache| Cache | normal | |
| ✗ |org.apache.linkis.manager.am.converter.DefaultMetricsConverter| Converter | normal | |
| ✗ |org.apache.linkis.manager.am.label.AMLabelChecker| Check | normal | |
| ✗ |org.apache.linkis.manager.am.label.AMLabelFilter| Filter | normal | |
| ✗ |org.apache.linkis.manager.am.label.DefaultManagerLabelService| Service | normal | |
| ✗ |org.apache.linkis.manager.am.label.MultiUserEngineReuseLabelChooser| Chooser | normal | |
| ✗ |org.apache.linkis.manager.am.locker.DefaultEngineNodeLocker| Chooser | normal | |
| ✗ |org.apache.linkis.manager.am.manager.DefaultEMNodeManager| Chooser | normal | |
| ✗ |org.apache.linkis.manager.am.manager.DefaultEngineNodeManager| Chooser | normal | |
| ✗ |org.apache.linkis.manager.am.pointer.*| pointer | normal | |
| ✗ |org.apache.linkis.manager.am.recycle.AssignNodeRuleExecutor| Executor | normal | |
| ✗ |org.apache.linkis.manager.am.service.cache.ConfCacheRemoveBroadcastListener| Cache | normal | |
| ✗ |org.apache.linkis.manager.am.service.em.*| Service | normal | |
| ✗ |org.apache.linkis.manager.am.service.engine.*| Service | normal | |
| ✗ |org.apache.linkis.manager.am.service.heartbeat.AMHeartbeatService| Service | normal | |
| ✗ |org.apache.linkis.manager.am.service.monitor.NodeHeartbeatMonitor| Service | normal | |
| ✗ |org.apache.linkis.manager.am.utils.AMUtils| utils| normal | |
| ✗ |org.apache.linkis.manager.label.score.DefaultNodeLabelScorer| Label| normal | |
| ✗ |org.apache.linkis.manager.label.service.impl.*| Service| normal | |
| ✗ |org.apache.linkis.manager.rm.external.yarn.YarnResourceRequester| Yarn| normal | |
| ✗ |org.apache.linkis.manager.rm.message.RMMessageService| Yarn| normal | |
| ✗ |org.apache.linkis.manager.rm.restful.RMMonitorRest| api| normal | |
| ✗ |org.apache.linkis.manager.rm.service.*| service| normal | |
| ✗ |org.apache.linkis.manager.rm.utils.*| utils| normal | |