[SCB-2274]change connecting config/dashboard services rule to round robbin

[liubao68]

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[codecov-commenter]

Codecov Report

Merging #2404 (7d6453a) into master (d666309) will increase coverage by 0.04%.
The diff coverage is 42.30%.

@@             Coverage Diff              @@
##             master    #2404      +/-   ##
============================================
+ Coverage     79.93%   79.97%   +0.04%     
  Complexity     1408     1408              
============================================
  Files          1549     1549              
  Lines         41356    41348       -8     
  Branches       3444     3444              
============================================
+ Hits          33057    33068      +11     
+ Misses         6826     6808      -18     
+ Partials       1473     1472       -1     

Impacted Files	Coverage Δ
...pache/servicecomb/config/kie/client/KieClient.java	0.00% <0.00%> (ø)
...omb/config/kie/client/model/KieAddressManager.java	0.00% <0.00%> (ø)
.../service/center/client/ServiceCenterRawClient.java	67.64% <ø> (+3.75%)	⬆️
...comb/service/center/client/ServiceCenterWatch.java	0.00% <0.00%> (ø)
...vicecomb/service/center/client/AddressManager.java	64.70% <80.00%> (+19.70%)	⬆️
...rvicecomb/config/center/client/AddressManager.java	68.75% <100.00%> (-4.94%)	⬇️
...ecomb/config/center/client/ConfigCenterClient.java	46.93% <100.00%> (+3.46%)	⬆️
...egistry/client/http/ServiceRegistryClientImpl.java	70.01% <0.00%> (+1.16%)	⬆️
...mb/serviceregistry/client/http/RestClientUtil.java	77.57% <0.00%> (+1.86%)	⬆️
...ecomb/provider/pojo/PojoConsumerMetaRefresher.java	78.04% <0.00%> (+2.43%)	⬆️

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