Refactor, configuration override does not work properly.

[chickenlj]

Fixes #5224

[codecov-io]

Codecov Report

Merging #5709 into master will decrease coverage by 0.11%.
The diff coverage is 98.52%.

@@             Coverage Diff             @@
##             master   #5709      +/-   ##
===========================================
- Coverage     61.51%   61.4%   -0.12%     
- Complexity      491     495       +4     
===========================================
  Files           926     929       +3     
  Lines         37852   38016     +164     
  Branches       5463    5459       -4     
===========================================
+ Hits          23284   23342      +58     
- Misses        12046   12143      +97     
- Partials       2522    2531       +9

Impacted Files	Coverage Δ	Complexity Δ
...pache/dubbo/common/config/SystemConfiguration.java	100% <100%> (ø)	0 <0> (ø)	⬇️
...che/dubbo/common/config/InmemoryConfiguration.java	84.61% <100%> (-1.1%)	0 <0> (ø)
...va/org/apache/dubbo/common/config/Environment.java	97.33% <100%> (+1.38%)	0 <0> (ø)	⬇️
.../dubbo/common/config/EnvironmentConfiguration.java	100% <100%> (ø)	0 <0> (ø)	⬇️
...e/dubbo/common/config/PropertiesConfiguration.java	94.44% <100%> (+9.44%)	0 <0> (ø)	⬇️
...n/java/org/apache/dubbo/config/AbstractConfig.java	72.72% <100%> (-1%)	0 <0> (ø)
...bbo/config/context/ConfigConfigurationAdapter.java	100% <100%> (ø)	0 <0> (ø)	⬇️
...he/dubbo/common/config/CompositeConfiguration.java	69.76% <93.75%> (+7.69%)	0 <0> (ø)	⬇️
.../org/apache/dubbo/rpc/model/ServiceRepository.java	63.63% <0%> (-14.42%)	0% <0%> (ø)
...ache/dubbo/remoting/transport/AbstractChannel.java	75% <0%> (-12.5%)	0% <0%> (ø)
... and 67 more

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[chickenlj]

reviewed by issue reporters