Add token support

[xujianhai666]

What this PR does:
Add token support

[codecov-io]

Codecov Report

Merging #202 into develop will increase coverage by 0.05%.
The diff coverage is 68.96%.

@@             Coverage Diff             @@
##           develop     #202      +/-   ##
===========================================
+ Coverage    65.22%   65.28%   +0.05%     
===========================================
  Files           95       96       +1     
  Lines         6416     6444      +28     
===========================================
+ Hits          4185     4207      +22     
- Misses        1791     1798       +7     
+ Partials       440      439       -1

Impacted Files	Coverage Δ
common/url.go	68.97% <0%> (-1.64%)	⬇️
protocol/dubbo/dubbo_invoker.go	84.09% <100%> (+1.16%)	⬆️
config/service_config.go	65.11% <100%> (+0.83%)	⬆️
filter/impl/token_filter.go	87.5% <87.5%> (ø)
protocol/jsonrpc/server.go	61.3% <0%> (+1.5%)	⬆️

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[fangyincheng]

LGTM.

please merge newest code.

[gaoxinge]

LGTM.