Support protobuf serialization in the env of multiple class loader.

[ujjboy]

#48

[codecov-io]

Codecov Report

Merging #49 into master will increase coverage by 0.05%.
The diff coverage is 62.65%.

@@             Coverage Diff              @@
##             master      #49      +/-   ##
============================================
+ Coverage     63.49%   63.54%   +0.05%     
- Complexity      585      593       +8     
============================================
  Files           263      263              
  Lines         11226    11272      +46     
  Branches       1871     1884      +13     
============================================
+ Hits           7128     7163      +35     
- Misses         3133     3140       +7     
- Partials        965      969       +4

Impacted Files	Coverage Δ	Complexity Δ
...ipay/sofa/rpc/codec/bolt/SofaRpcSerialization.java	47.02% <0%> (-0.37%)	36 <0> (ø)
...a/com/alipay/sofa/rpc/common/utils/ClassUtils.java	79.43% <100%> (+3.59%)	0 <0> (ø)	⬇️
...lipay/sofa/rpc/codec/antpb/ProtobufSerializer.java	53.84% <63.26%> (+6.02%)	17 <11> (+8)	⬆️
...ent/aft/impl/ServiceHorizontalMeasureStrategy.java	83.65% <0%> (-2.89%)	22% <0%> (-1%)
...n/java/com/alipay/sofa/rpc/common/SofaConfigs.java	83.92% <0%> (-1.79%)	0% <0%> (ø)
...pay/sofa/rpc/client/aft/InvocationStatFactory.java	87.8% <0%> (+4.87%)	16% <0%> (+1%)	⬆️

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