[type:refactor] refactor shenyu admin listener module

[moremind]

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 ./mvnw clean install -Dmaven.javadoc.skip=true.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 88.99083% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 61.89%. Comparing base (3d5eb46) to head (125a856).
⚠️ Report is 408 commits behind head on master.

Files with missing lines	Patch %	Lines
...henyu/admin/config/properties/ZookeeperConfig.java	80.64%	6 Missing ⚠️
...enyu/admin/listener/zookeeper/ZookeeperClient.java	92.30%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5347      +/-   ##
============================================
- Coverage     61.95%   61.89%   -0.07%     
- Complexity     8719     8815      +96     
============================================
  Files          1255     1260       +5     
  Lines         38356    38691     +335     
  Branches       3675     3697      +22     
============================================
+ Hits          23765    23948     +183     
- Misses        12480    12623     +143     
- Partials       2111     2120       +9     

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