编辑portal系统参数时，如果不刷新页面，配置出现覆盖，不是新增

[zyong2004]

编辑portal系统参数时，如果不刷新页面，配置出现覆盖，不是新增

[codecov-io]

Codecov Report

Merging #1521 into master will decrease coverage by 0.19%.
The diff coverage is 0%.

@@             Coverage Diff             @@
##             master    #1521     +/-   ##
===========================================
- Coverage     48.65%   48.46%   -0.2%     
+ Complexity     1881     1867     -14     
===========================================
  Files           394      393      -1     
  Lines         11419    11341     -78     
  Branches       1172     1166      -6     
===========================================
- Hits           5556     5496     -60     
+ Misses         5437     5424     -13     
+ Partials        426      421      -5

Impacted Files	Coverage Δ	Complexity Δ
...ollo/portal/controller/ServerConfigController.java	7.14% <0%> (-0.55%)	1 <0> (ø)
...ip/framework/apollo/mockserver/EmbeddedApollo.java
.../apollo/internals/RemoteConfigLongPollService.java	77.91% <0%> (+0.61%)	28% <0%> (+1%)	⬆️
...lo/configservice/util/InstanceConfigAuditUtil.java	77.19% <0%> (+7.01%)	15% <0%> (+2%)	⬆️

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[nobodyiam]

Thanks!