test: add unit test[ArrayUtils,ConfigTools,MapUtil]

[liuqiufeng]

• I have registered the PR changes.

Ⅰ. Describe what this PR did

Add unit tests of the following classes:
添加如下类的单元测试:
io.seata.common.util.ArrayUtils
io.seata.common.util.ConfigTools
io.seata.common.util.MapUtil

Ⅱ. Does this pull request fix one issue?

fixes #5305

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-commenter]

Codecov Report

Merging #5309 (75783dd) into 2.x (207dda4) will increase coverage by 0.23%.
The diff coverage is n/a.

❗ Current head 75783dd differs from pull request most recent head f0bd553. Consider uploading reports for the commit f0bd553 to get more accurate results

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@@             Coverage Diff              @@
##                2.x    #5309      +/-   ##
============================================
+ Coverage     48.59%   48.83%   +0.23%     
- Complexity     4195     4218      +23     
============================================
  Files           764      764              
  Lines         26870    26870              
  Branches       3352     3352              
============================================
+ Hits          13058    13122      +64     
+ Misses        12430    12372      -58     
+ Partials       1382     1376       -6     

Impacted Files	Coverage Δ
...rc/main/java/io/seata/common/util/ConfigTools.java	71.18% <0.00%> (+16.94%)	⬆️
...src/main/java/io/seata/common/util/ArrayUtils.java	97.05% <0.00%> (+41.17%)	⬆️
...on/src/main/java/io/seata/common/util/MapUtil.java	95.23% <0.00%> (+95.23%)	⬆️

[funky-eyes]

Lack of change log

[funky-eyes]

LGTM

[slievrly]

LGTM