simplifed and beautify code

[leechor]

What is the purpose of the change

simplifed and beautify code.not change behaviour.
pass.

[codecov-io]

Codecov Report

Merging #4921 into master will increase coverage by 0.02%.
The diff coverage is 50.53%.

@@             Coverage Diff              @@
##             master    #4921      +/-   ##
============================================
+ Coverage     63.96%   63.98%   +0.02%     
  Complexity      451      451              
============================================
  Files           769      769              
  Lines         33160    33160              
  Branches       5230     5230              
============================================
+ Hits          21210    21217       +7     
+ Misses         9525     9521       -4     
+ Partials       2425     2422       -3

Impacted Files	Coverage Δ	Complexity Δ
...apache/dubbo/common/utils/CompatibleTypeUtils.java	66.34% <43.24%> (ø)	0 <0> (ø)	⬇️
...va/org/apache/dubbo/common/utils/ReflectUtils.java	71.07% <55.35%> (ø)	0 <0> (ø)	⬇️
.../remoting/transport/netty4/NettyClientHandler.java	61.4% <0%> (-7.02%)	0% <0%> (ø)
...pache/dubbo/registry/support/AbstractRegistry.java	80.07% <0%> (-1.54%)	0% <0%> (ø)
...a/org/apache/dubbo/monitor/dubbo/DubboMonitor.java	89.71% <0%> (-0.94%)	16% <0%> (-1%)
...g/apache/dubbo/registry/consul/ConsulRegistry.java	62.5% <0%> (+0.62%)	29% <0%> (ø)	⬇️
...ache/dubbo/rpc/protocol/ProtocolFilterWrapper.java	88.33% <0%> (+3.33%)	0% <0%> (ø)	⬇️
.../apache/dubbo/remoting/transport/AbstractPeer.java	63.04% <0%> (+4.34%)	0% <0%> (ø)	⬇️
...e/dubbo/remoting/transport/netty/NettyChannel.java	62.35% <0%> (+4.7%)	21% <0%> (+1%)	⬆️
...bbo/registry/support/ProviderConsumerRegTable.java	85.36% <0%> (+4.87%)	0% <0%> (ø)	⬇️
... and 3 more

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[beiwei30]

@leechor would you mind to take look into CI? there are unit tests failing.

[leechor]

@leechor would you mind to take look into CI? there are unit tests failing.

misunderstand a method's function, and the unit test of this method not contains this case, have fix it.

[beiwei30]

LGTM.