Fix:fixed url encode

[fangyincheng]

What this PR does:

fix that “,” code twice become “%252”.

[codecov-io]

Codecov Report

Merging #802 into develop will decrease coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #802      +/-   ##
===========================================
- Coverage    59.80%   59.76%   -0.04%     
===========================================
  Files          259      259              
  Lines        12752    12752              
===========================================
- Hits          7626     7621       -5     
  Misses        4171     4171              
- Partials       955      960       +5     

Impacted Files	Coverage Δ
config_center/nacos/facade.go	79.31% <0.00%> (-10.35%)	⬇️
metadata/report/delegate/delegate_report.go	29.66% <0.00%> (-9.33%)	⬇️
remoting/kubernetes/watch.go	75.00% <0.00%> (-4.35%)	⬇️
remoting/kubernetes/client.go	72.72% <0.00%> (-3.04%)	⬇️
config_center/nacos/client.go	65.26% <0.00%> (-2.11%)	⬇️
remoting/kubernetes/registry_controller.go	50.20% <0.00%> (-1.23%)	⬇️
remoting/kubernetes/listener.go	50.52% <0.00%> (ø)
filter/filter_impl/hystrix_filter.go	70.19% <0.00%> (+2.88%)	⬆️
registry/consul/service_discovery.go	73.64% <0.00%> (+6.58%)	⬆️

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[AlexStocks]

Pls do not merge until @fangyincheng adds an ut.

[zouyx]

Pls do not merge until @fangyincheng adds an ut.

Agree