[SCB-2813]Nacos implementation not properly handle instance change

[liubao68]

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[codecov-commenter]

Codecov Report

Merging #3982 (0cc7560) into master (ed60267) will increase coverage by 0.00%.
The diff coverage is 63.63%.

❗ Current head 0cc7560 differs from pull request most recent head ee0381c. Consider uploading reports for the commit ee0381c to get more accurate results

@@            Coverage Diff            @@
##             master    #3982   +/-   ##
=========================================
  Coverage     43.99%   44.00%           
+ Complexity     5329     5328    -1     
=========================================
  Files          1392     1392           
  Lines         34041    34055   +14     
  Branches       3331     3331           
=========================================
+ Hits          14978    14986    +8     
- Misses        17874    17884   +10     
+ Partials       1189     1185    -4     

Files	Coverage Δ
...cecomb/common/rest/locator/ServicePathManager.java	58.00% <ø> (-3.82%)	⬇️
...omb/config/nacos/NacosDynamicPropertiesSource.java	0.00% <ø> (ø)
...rvicecomb/foundation/metrics/MetricsBootstrap.java	90.32% <100.00%> (+6.98%)	⬆️
...omb/foundation/metrics/MetricsBootstrapConfig.java	78.57% <ø> (ø)
.../registry/discovery/StatefulDiscoveryInstance.java	81.13% <100.00%> (+4.20%)	⬆️
...ecomb/foundation/common/utils/SPIServiceUtils.java	70.17% <100.00%> (-1.26%)	⬇️
.../apache/servicecomb/registry/DiscoveryManager.java	69.51% <56.75%> (-1.83%)	⬇️

... and 13 files with indirect coverage changes

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