Fix some failing unit tests in nacos config module

[onewe]

Close #8348

What is the purpose of the change

XXXXX

Brief changelog

XX

Verifying this change

XXXX

Follow this checklist to help us incorporate your contribution quickly and easily:

• Make sure there is a Github issue filed for the change (usually before you start working on it). Trivial changes like typos do not require a Github issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
• Format the pull request title like [ISSUE #123] Fix UnknownException when host config not exist. Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add integration-test in test module.
• Run mvn -B clean package apache-rat:check findbugs:findbugs -Dmaven.test.skip=true to make sure basic checks pass. Run mvn clean install -DskipITs to make sure unit-test pass. Run mvn clean test-compile failsafe:integration-test to make sure integration-test pass.

[codecov-commenter]

Codecov Report

Merging #8379 (f424619) into develop (eb57028) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop    #8379      +/-   ##
=============================================
- Coverage      41.24%   41.22%   -0.03%     
- Complexity      4370     4371       +1     
=============================================
  Files            873      873              
  Lines          31821    31821              
  Branches        3706     3706              
=============================================
- Hits           13125    13118       -7     
- Misses         17388    17394       +6     
- Partials        1308     1309       +1     

Impacted Files	Coverage Δ
...os/client/auth/ram/identify/CredentialService.java	78.84% <0.00%> (-3.85%)	⬇️
...ent/manager/impl/EphemeralIpPortClientManager.java	66.00% <0.00%> (-2.00%)	⬇️
...m/alibaba/nacos/core/remote/ConnectionManager.java	44.37% <0.00%> (-1.48%)	⬇️
...alibaba/nacos/client/config/impl/ClientWorker.java	50.39% <0.00%> (-0.20%)	⬇️
.../naming/push/v1/NamingSubscriberServiceV1Impl.java	66.66% <0.00%> (ø)
...naming/core/v2/metadata/NamingMetadataManager.java	79.74% <0.00%> (+1.26%)	⬆️
...a/com/alibaba/nacos/naming/push/v1/PushClient.java	46.93% <0.00%> (+2.04%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update eb57028...f424619. Read the comment docs.

[onewe]