Simplify url assembly in test cases

[klboke]

What's the purpose of this PR

Simplify url assembly in test cases

[codecov]

Codecov Report

Merging #4682 (5c2b730) into master (d262471) will increase coverage by 0.06%.
The diff coverage is n/a.

❗ Current head 5c2b730 differs from pull request most recent head 6a52293. Consider uploading reports for the commit 6a52293 to get more accurate results

@@             Coverage Diff              @@
##             master    #4682      +/-   ##
============================================
+ Coverage     47.15%   47.21%   +0.06%     
- Complexity     1656     1659       +3     
============================================
  Files           349      349              
  Lines         10691    10691              
  Branches       1062     1062              
============================================
+ Hits           5041     5048       +7     
+ Misses         5345     5338       -7     
  Partials        305      305              

Impacted Files	Coverage Δ
...ervice/service/ReleaseMessageServiceWithCache.java	85.88% <0.00%> (-1.18%)	⬇️
...mework/apollo/openapi/service/ConsumerService.java	58.46% <0.00%> (+1.53%)	⬆️
...work/apollo/biz/message/ReleaseMessageScanner.java	85.52% <0.00%> (+2.63%)	⬆️
...work/apollo/biz/message/DatabaseMessageSender.java	64.58% <0.00%> (+8.33%)	⬆️

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[Anilople]

LGTM