please remove zookeeper dependent

[douxiaofeng99]

Feature Request

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Is your feature request related to a problem?

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Describe the feature you would like.

The shardingsphere-elasticjob heavily depend on the zookeeper, so it is no light weight too. pls. consider remove zookeeper like kafka.

[huaihuailj]

您好，我已收到您的邮件，我会尽快回复~

[linghengqian]

• Do you want to submit a PR with a fix?