Fix#1254#1305 bug on JSON serialization and deserialization

[gofow]

Motivation:

Fix#1254#1305 bug on JSON serialization and deserialization

Modification:

1. In BeanSerializer.serialize(), create a fresh Map when the "bean" is a Map instance, in order to prevent any unpredictable changes due to references
2. In BeanSerializer.serialize(), use class.getName() rather than class.getCanonicalName() when the bean is a custom object, in order to get correct representation of inner class for class loader
3. Add two cases to JSONTest

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[EvenLjj]

@gofow Pls format code by mvn clean compile before git push.

[gofow]

@EvenLjj Thank you! Actually I'm feeling confused about the error, and I have done with the format.

[EvenLjj]

LGTM

[codecov]

Codecov Report

Merging #1306 (19fdf5a) into master (75bc1ff) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #1306      +/-   ##
============================================
- Coverage     71.97%   71.96%   -0.02%     
  Complexity      783      783              
============================================
  Files           415      415              
  Lines         17651    17651              
  Branches       2753     2753              
============================================
- Hits          12705    12703       -2     
- Misses         3538     3546       +8     
+ Partials       1408     1402       -6     

Impacted Files	Coverage Δ
...om/alipay/sofa/rpc/common/json/BeanSerializer.java	87.07% <100.00%> (+0.56%)	⬆️
...java/com/alipay/sofa/rpc/module/LookoutModule.java	52.38% <0.00%> (-33.34%)	⬇️
...n/java/com/alipay/sofa/rpc/common/SofaConfigs.java	84.90% <0.00%> (-1.89%)	⬇️
...ay/sofa/rpc/client/AllConnectConnectionHolder.java	60.76% <0.00%> (-0.26%)	⬇️
...lipay/sofa/rpc/message/AbstractResponseFuture.java	57.01% <0.00%> (+0.87%)	⬆️
.../com/alipay/sofa/rpc/context/RpcInvokeContext.java	82.40% <0.00%> (+0.92%)	⬆️
...com/alipay/sofa/rpc/context/RpcRuntimeContext.java	90.12% <0.00%> (+1.23%)	⬆️
...pay/sofa/rpc/transport/ClientTransportFactory.java	78.46% <0.00%> (+1.53%)	⬆️
...n/java/com/alipay/sofa/rpc/log/TimeWaitLogger.java	84.00% <0.00%> (+4.00%)	⬆️
... and 1 more

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