add test for nacos register center client

[freedom-xiao007]

// Describe your PR here; eg. Fixes #issueNo

Make sure that:

• You have read the contribution guidelines.
• You submit test cases (unit or integration tests) that back your changes.
• Your local test passed mvn clean install -Dmaven.javadoc.skip=true.

[codecov-io]

Codecov Report

Merging #1220 (8a5d9f0) into master (a99c9fc) will increase coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1220      +/-   ##
============================================
+ Coverage     70.33%   70.36%   +0.03%     
- Complexity     2088     2093       +5     
============================================
  Files           375      376       +1     
  Lines          8278     8322      +44     
  Branches        902      903       +1     
============================================
+ Hits           5822     5856      +34     
- Misses         2014     2018       +4     
- Partials        442      448       +6     

Impacted Files	Coverage Δ	Complexity Δ
...er/client/nacos/NacosClientRegisterRepository.java	70.45% <0.00%> (ø)	5.00% <0.00%> (?%)
...omara/soul/sync/data/http/HttpSyncDataService.java	75.49% <0.00%> (+2.94%)	12.00% <0.00%> (ø%)

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