[Enhancement] namesrv clusterTest模式（ClusterTestRequestProcessor遗漏更新）

[juhuan]

Before Creating the Enhancement Request

• [X] I have confirmed that this should be classified as an enhancement rather than a bug/feature.

Summary

看代码原先clusterTest模式中ClusterTestRequestProcessor是对ClientRequestProcessor的增强，本机namesrv拿不到路由信息时会从集群获取。但发现ClientRequestProcessor后来加了一些增强功能未在ClusterTestRequestProcessor中实现，是不是得重构下clusterTest模式的实现啦？不然少了这些增强了

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