How to dynamicly delete jobs cleanly.

[kaihekaihe]

Feature Request

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In elasticjob-java sdk,jobs can be added and run at any time.How can we dynamicly delete jobs cleanly.Is it right following steps below?
1、Call shutdown method in ScheduleJobBootstrap
2、Remove job root in zk

[TeslaCN]

The current shutdown method will not remove data from registry center. Maybe we can add a new method or set a flag to cleanup data.