Add some unit test for common module

[BurningCN]

What is the purpose of the change

Add some unit test for common module

[codecov-commenter]

Codecov Report

Merging #8000 (3ff9556) into master (9f6b536) will increase coverage by 0.09%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #8000      +/-   ##
============================================
+ Coverage     60.85%   60.94%   +0.09%     
  Complexity      491      491              
============================================
  Files          1089     1090       +1     
  Lines         43876    43937      +61     
  Branches       6413     6420       +7     
============================================
+ Hits          26699    26776      +77     
+ Misses        14208    14194      -14     
+ Partials       2969     2967       -2     

Impacted Files	Coverage Δ
...n/java/org/apache/dubbo/common/utils/LFUCache.java	80.86% <0.00%> (-5.42%)	⬇️
.../dubbo/remoting/transport/netty4/NettyChannel.java	59.40% <0.00%> (-1.99%)	⬇️
...pache/dubbo/registry/support/AbstractRegistry.java	77.40% <0.00%> (-1.49%)	⬇️
...e/dubbo/remoting/transport/netty4/NettyClient.java	69.56% <0.00%> (-1.45%)	⬇️
...ting/zookeeper/curator/CuratorZookeeperClient.java	69.54% <0.00%> (-1.15%)	⬇️
...he/dubbo/registry/multicast/MulticastRegistry.java	69.30% <0.00%> (-0.94%)	⬇️
...n/java/org/apache/dubbo/config/ConsumerConfig.java	92.85% <0.00%> (ø)
...apache/dubbo/rpc/cluster/support/ClusterUtils.java	60.00% <0.00%> (ø)
...bbo/config/bootstrap/builders/ConsumerBuilder.java	93.10% <0.00%> (ø)
...enter/support/nacos/NacosConfigServiceWrapper.java	0.00% <0.00%> (ø)
... and 14 more

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