[3.0-Triple] Fix NPE in get configuration

[guohao]

What is the purpose of the change

Fix IT error in triple compressor

Brief changelog

Verifying this change

Checklist

• Make sure there is a GitHub_issue field for the change (usually before you start working on it). Trivial changes like typos do not require a GitHub issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
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• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Check if is necessary to patch to Dubbo 3 if you are work on Dubbo 2.7
• Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add sample in dubbo samples project.
• Add some description to dubbo-website project if you are requesting to add a feature.
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• If this contribution is large, please follow the Software Donation Guide.

[codecov-commenter]

Codecov Report

Merging #9024 (0ec05a2) into 3.0 (e676350) will decrease coverage by 0.00%.
The diff coverage is 60.00%.

@@             Coverage Diff              @@
##                3.0    #9024      +/-   ##
============================================
- Coverage     63.34%   63.33%   -0.01%     
  Complexity      315      315              
============================================
  Files          1189     1189              
  Lines         50461    50473      +12     
  Branches       7537     7540       +3     
============================================
+ Hits          31963    31969       +6     
- Misses        15010    15015       +5     
- Partials       3488     3489       +1     

Impacted Files	Coverage Δ
...e/dubbo/rpc/protocol/tri/AbstractClientStream.java	63.73% <58.33%> (ø)
...o/rpc/protocol/tri/TripleClientRequestHandler.java	58.73% <100.00%> (ø)
.../dubbo/rpc/protocol/tri/service/TriHealthImpl.java	28.37% <0.00%> (-4.96%)	⬇️
.../apache/dubbo/remoting/transport/AbstractPeer.java	63.04% <0.00%> (-2.18%)	⬇️
...pache/dubbo/remoting/transport/AbstractServer.java	61.42% <0.00%> (-1.43%)	⬇️
...che/dubbo/config/deploy/DefaultModuleDeployer.java	64.28% <0.00%> (-0.17%)	⬇️
...ubbo/config/deploy/DefaultApplicationDeployer.java	79.32% <0.00%> (-0.14%)	⬇️
...ng/zookeeper/curator5/Curator5ZookeeperClient.java	67.96% <0.00%> (+0.48%)	⬆️
...dubbo/remoting/exchange/support/DefaultFuture.java	89.28% <0.00%> (+0.89%)	⬆️
...ting/zookeeper/curator/CuratorZookeeperClient.java	71.35% <0.00%> (+0.97%)	⬆️
... and 2 more

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