add ServiceConfigURLDelegate for protostuff

[zrlw]

What is the purpose of the change

• add protostuff serialization
• fix ServiceConfigURL of dubbo 3.0 serialization problem: public parameters such as application,version are not be transferred

[zrlw]

@xiaoheng1

[codecov-commenter]

Codecov Report

Merging #67 (1abe508) into master (b100785) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #67   +/-   ##
=========================================
  Coverage     36.80%   36.80%           
  Complexity       61       61           
=========================================
  Files            30       30           
  Lines           644      644           
  Branches         74       74           
=========================================
  Hits            237      237           
  Misses          386      386           
  Partials         21       21           

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[songxiaosheng]

please fix conficts, thanks

[zrlw]

please fix conficts, thanks

fixed. I'm surprised that this PR committed two years ago is still existed.

[songxiaosheng]

please fix conficts, thanks

fixed. I'm surprised that this PR committed two years ago is still existed.
thanks，we can try merge it

[zrlw]

re-enable test_URL_mutable_withType at AbstractSerializationTest.java since it could be also used by KryoPersonOkTest and KyroSerializationTest.

[songxiaosheng]

LGTM