修复springcloud双注册场景，使用zk注册中心有可能无法去重的bug

[TangLeDaily]

【修复issue】#1241

【修改内容】
修改了com.huawei.registry.interceptors.cloud3.x.ZookeeperInstanceSupplierInterceptor中convertAndMerge()方法去重方式

【用例描述】功能不变，不需要修改用例

【自测情况】本地静态检查通过、UT通过、去重测试通过

【影响范围】不涉及

[codecov]

Codecov Report

Patch coverage: 93.33% and project coverage change: +0.02% 🎉

Comparison is base (2556a16) 45.53% compared to head (404c4d7) 45.56%.
Report is 3 commits behind head on 1.0.x.

Additional details and impacted files

@@             Coverage Diff              @@
##              1.0.x    #1264      +/-   ##
============================================
+ Coverage     45.53%   45.56%   +0.02%     
- Complexity     2921     2924       +3     
============================================
  Files           676      676              
  Lines         14946    14952       +6     
  Branches       1678     1679       +1     
============================================
+ Hits           6806     6813       +7     
  Misses         7296     7296              
+ Partials        844      843       -1     

Flag	Coverage Δ
unittests	45.56% <93.33%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
...ter/spring/declarer/ClientHttpRequestDeclarer.java	0.00% <ø> (ø)
...ring/interceptor/ClientHttpRequestInterceptor.java	90.00% <80.00%> (ø)
...cloud3/x/ZookeeperInstanceSupplierInterceptor.java	79.16% <100.00%> (+6.94%)	⬆️

... and 1 file with indirect coverage changes

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