Allow users to config comma-separated namespaces for ApolloConfigChangeListener

[anandjoshisn]

Another solution for. - #7

[anandjoshi91]

Need to check why build for java 8 is failing.

Failures: Error: ConfigIntegrationTest.testGetConfigWithLocalFileAndWithRemoteConfig:168 expected:<[another]Value> but was:<[some]Value> Error: ConfigIntegrationTest.testGetConfigWithNoLocalFileAndRemoteConfigServiceRetry:297 expected:<someValue> but was:<null> Error: ConfigIntegrationTest.testGetConfigWithNoLocalFileAndRemoteMetaServiceRetry:282 expected:<someValue> but was:<null> Error: ConfigIntegrationTest.testGetConfigWithNoLocalFileButWithRemoteConfig:125 expected:<someValue> but was:<null> Error: ConfigIntegrationTest.testLongPollRefresh:372 expected:<someValue> but was:<null> Error: ConfigIntegrationTest.testLongPollRefreshWithMultipleNamespacesAndMultipleNamespaceNotified:459 expected:<someValue> but was:<null> Error: ConfigIntegrationTest.testLongPollRefreshWithMultipleNamespacesAndOnlyOneNamespaceNotified:413 expected:<someValue> but was:<null> Error: ConfigIntegrationTest.testOrderGetConfigWithLocalFileAndWithRemoteConfig:201 expected:<[another]Value> but was:<[some]Value> Error: Errors: Error: ConfigIntegrationTest.testOrderGetConfigWithNoLocalFileButWithRemoteConfig:148 » NoSuchElement Error: ConfigIntegrationTest.testRefreshConfig:343 » Timeout Waited 2500 milliseconds...

https://github.com/apolloconfig/apollo-java/actions/runs/3779089827/jobs/6424087585

[nobodyiam]

1. I have submitted a #12 to fix the potential test error issue, you may update your branch with the latest code
2. Please also help to update the usage example of ApolloConfigChangeListener.java and CHANGES.md.

[codecov]

Codecov Report

Merging #11 (2bb6474) into main (041fdf4) will increase coverage by 0.39%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main      #11      +/-   ##
============================================
+ Coverage     67.77%   68.16%   +0.39%     
- Complexity     1165     1175      +10     
============================================
  Files           165      165              
  Lines          5114     5124      +10     
  Branches        559      561       +2     
============================================
+ Hits           3466     3493      +27     
+ Misses         1381     1366      -15     
+ Partials        267      265       -2     

Impacted Files	Coverage Δ
...o/spring/annotation/ApolloAnnotationProcessor.java	91.96% <100.00%> (+0.78%)	⬆️
...rk/apollo/spring/property/SpringValueRegistry.java	83.78% <0.00%> (-5.41%)	⬇️
.../framework/apollo/spring/property/SpringValue.java	87.71% <0.00%> (-1.76%)	⬇️
.../apollo/internals/RemoteConfigLongPollService.java	80.83% <0.00%> (+2.39%)	⬆️
...va/com/ctrip/framework/apollo/util/ConfigUtil.java	86.84% <0.00%> (+4.21%)	⬆️
...rk/apollo/internals/DefaultMetaServerProvider.java	100.00% <0.00%> (+42.10%)	⬆️

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[nobodyiam]

LGTM