[ISSUE #4991] add unit test for LogUtil

[melisolmez]

Fixes #4991

Motivation
Increase test coverage

Modifications
Added new tests for LogUtil.java located https://github.com/apache/eventmesh/blob/master/eventmesh-common/src/main/java/org/apache/eventmesh/common/utils/LogUtilTest.java

Documentation
Does this pull request introduce a new feature? (no)
If yes, how is the feature documented? (not applicable)
If a feature is not applicable for documentation, explain why?
If a feature is not documented yet in this PR, please create a followup issue for adding the documentation

[github-actions]

Welcome to the Apache EventMesh community!!
This is your first PR in our project. We're very excited to have you onboard contributing. Your contributions are greatly appreciated!

Please make sure that the changes are covered by tests.
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[harshithasudhakar]

Hi, please resolve the failing CI errors. To resolve the issue, you can view the test report generated during the build.

[melisolmez]

hello @harshithasudhakar, I tried solve this problem but I cannot understand. There were failing tests. See the report at: file:///Users/runner/work/eventmesh/eventmesh/eventmesh-common/build/reports/tests/test/index.html when I saw this location but there is not fail test in index.html. Could you help with this problem?

[harshithasudhakar]

I re-ran the build, it has passed :)