[type:fix] fixed AbstractShenyuPluginTest:increase independence of te…

[tian-pengfei]

increase independence of testing and accuracy of test

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.

Completion does not indicate success , so add verify();
When I added verify , I found ths tests influence each other becase of cache .

If I didnt add clearing cache , it happens some tests have errors

If I did it, it works

[codecov-commenter]

Codecov Report

Merging #4150 (3102747) into master (04f650d) will increase coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #4150      +/-   ##
============================================
+ Coverage     70.13%   70.16%   +0.03%     
- Complexity     6999     7003       +4     
============================================
  Files           953      953              
  Lines         26262    26262              
  Branches       2348     2348              
============================================
+ Hits          18419    18427       +8     
+ Misses         6413     6408       -5     
+ Partials       1430     1427       -3     

Impacted Files	Coverage Δ
...apache/shenyu/plugin/base/cache/BaseDataCache.java	89.70% <0.00%> (-1.48%)	⬇️
...henyu/plugin/grpc/resolver/ShenyuNameResolver.java	63.82% <0.00%> (+1.06%)	⬆️
...henyu/admin/service/impl/UpstreamCheckService.java	64.00% <0.00%> (+1.33%)	⬆️
...pache/shenyu/plugin/base/AbstractShenyuPlugin.java	46.59% <0.00%> (+6.81%)	⬆️

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