test: Add test case for SpringCloudPluginConfiguration.

[Asxing]

test: Add test case for SpringCloudPluginConfiguration.

#878

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 #1073 (bd31406) into master (56ed5ef) will decrease coverage by 0.31%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1073      +/-   ##
============================================
- Coverage     75.25%   74.94%   -0.32%     
+ Complexity     2140     2133       -7     
============================================
  Files           365      366       +1     
  Lines          8080     8082       +2     
  Branches        884      884              
============================================
- Hits           6081     6057      -24     
- Misses         1535     1559      +24     
- Partials        464      466       +2     

Impacted Files	Coverage Δ	Complexity Δ
...omara/soul/sync/data/http/HttpSyncDataService.java	49.01% <0.00%> (-16.67%)	10.00% <0.00%> (-2.00%)
...oul/sync/data/http/refresh/DataRefreshFactory.java	91.66% <0.00%> (-8.34%)	4.00% <0.00%> (-1.00%)
...che/dubbo/ApacheDubboServiceBeanPostProcessor.java	79.10% <0.00%> (-4.48%)	11.00% <0.00%> (-2.00%)
...ba/dubbo/AlibabaDubboServiceBeanPostProcessor.java	79.10% <0.00%> (-4.48%)	11.00% <0.00%> (-2.00%)
.../soul/admin/service/impl/UpstreamCheckService.java	75.38% <0.00%> (-1.54%)	14.00% <0.00%> (-1.00%)
...soul/plugin/tars/cache/ApplicationConfigCache.java	81.94% <0.00%> (-1.39%)	12.00% <0.00%> (-1.00%)
...in/springcloud/SpringCloudPluginConfiguration.java	100.00% <0.00%> (ø)	2.00% <0.00%> (?%)

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