Add test cases for soul-admin

[dengliming]

添加一些admin测试的样例, 目前mapper访问数据库测试暂时使用H2, 后面如果使用到mysql特性无法兼容则直接使用testcontainer

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 mvn clean install -Dmaven.javadoc.skip=true.

[codecov-io]

Codecov Report

Merging #500 (ac3a543) into master (92b7584) will decrease coverage by 1.37%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #500      +/-   ##
============================================
- Coverage     15.08%   13.70%   -1.38%     
- Complexity      115      252     +137     
============================================
  Files           124      244     +120     
  Lines          2340     4975    +2635     
  Branches        274      463     +189     
============================================
+ Hits            353      682     +329     
- Misses         1927     4219    +2292     
- Partials         60       74      +14     

Impacted Files	Coverage Δ	Complexity Δ
...g/dromara/soul/admin/dto/SpringMvcRegisterDTO.java	0.00% <0.00%> (ø)	0.00% <0.00%> (?%)
...n/java/org/dromara/soul/admin/dto/SelectorDTO.java	0.00% <0.00%> (ø)	0.00% <0.00%> (?%)
...rg/dromara/soul/admin/utils/SoulResultMessage.java	0.00% <0.00%> (ø)	0.00% <0.00%> (?%)
...in/service/impl/SoulClientRegisterServiceImpl.java	5.07% <0.00%> (ø)	1.00% <0.00%> (?%)
.../java/org/dromara/soul/admin/entity/AppAuthDO.java	0.00% <0.00%> (ø)	0.00% <0.00%> (?%)
...oul/admin/listener/DataChangedEventDispatcher.java	28.57% <0.00%> (ø)	2.00% <0.00%> (?%)
...ain/java/org/dromara/soul/admin/vo/SoulDictVO.java	94.73% <0.00%> (ø)	13.00% <0.00%> (?%)
...n/java/org/dromara/soul/admin/entity/PluginDO.java	0.00% <0.00%> (ø)	0.00% <0.00%> (?%)
...romara/soul/admin/config/SwaggerConfiguration.java	100.00% <0.00%> (ø)	3.00% <0.00%> (?%)
...ain/java/org/dromara/soul/admin/vo/AuthPathVO.java	0.00% <0.00%> (ø)	0.00% <0.00%> (?%)
... and 111 more

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