删除集群中的服务，未删除对应服务的参数（t_ddh_cluster_variable，GlobalVariables）

[hawk9821]

Purpose of the pull request

Fix issues #545

Brief change log

Verify this pull request

This pull request is code cleanup without any test coverage.

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This pull request is already covered by existing tests, such as (please describe tests).

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This change added tests and can be verified as follows:

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