improve NetUtils

[lexburner]

1. filter network interface in NetUtils
2. remove the useless attribute in ApplicationConfig

[ralf0131]

Hi, I observed that the UT are failing, I've trigger a new build. If there is still error, please keep an eye on it and fix it.

[ralf0131]

Hi, please resolve the UT failures.

[codecov-io]

Codecov Report

Merging #3953 into master will decrease coverage by 0.25%.
The diff coverage is 33.33%.

@@             Coverage Diff             @@
##             master   #3953      +/-   ##
===========================================
- Coverage     63.85%   63.6%   -0.26%     
- Complexity       98     100       +2     
===========================================
  Files           713     720       +7     
  Lines         31481   31838     +357     
  Branches       5076    5113      +37     
===========================================
+ Hits          20102   20250     +148     
- Misses         9071    9270     +199     
- Partials       2308    2318      +10

Impacted Files	Coverage Δ	Complexity Δ
...ava/org/apache/dubbo/config/ApplicationConfig.java	97.59% <ø> (+2.24%)	0 <0> (ø)	⬇️
...n/java/org/apache/dubbo/common/utils/NetUtils.java	68.67% <33.33%> (-0.31%)	0 <0> (ø)
...ava/org/apache/dubbo/common/utils/ClassHelper.java	0% <0%> (-69.1%)	0% <0%> (ø)
...dubbo/rpc/protocol/dubbo/CallbackServiceCodec.java	80.14% <0%> (-0.74%)	0% <0%> (ø)
...che/dubbo/common/compiler/support/JdkCompiler.java	64.54% <0%> (ø)	0% <0%> (ø)	⬇️
...n/java/org/apache/dubbo/config/AbstractConfig.java	79.57% <0%> (ø)	0% <0%> (ø)	⬇️
...mon/serialize/java/CompactedObjectInputStream.java	64.28% <0%> (ø)	0% <0%> (ø)	⬇️
...apache/dubbo/common/extension/ExtensionLoader.java	79.11% <0%> (ø)	0% <0%> (ø)	⬇️
...g/apache/dubbo/common/bytecode/ClassGenerator.java	61.53% <0%> (ø)	0% <0%> (ø)	⬇️
.../java/org/apache/dubbo/config/ReferenceConfig.java	60.07% <0%> (ø)	0% <0%> (ø)	⬇️
... and 21 more

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[lexburner]

fixed now