Fixing flaky rate-limiting test

[yue9944882]

Fixing the following flaky tests by relaxing timestamp precision (from nano to milli)

SLF4J: See https://www.slf4j.org/codes.html#noProviders for further details.
Error:  Failures: 
Error:    DefaultRateLimitQueueTest.testSimpleRateLimitQueue:57 Unexpected time: 499985735 vs 500000000
Error:  Tests run: 102, Failures: 1, Errors: 0, Skipped: 0
Error:  Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:3.1.2:test (default-test) on project client-java-extended: There are test failures.
Error:  
Error:  Please refer to /home/runner/work/java/java/extended/target/surefire-reports for the individual test results.
Error:  Please refer to dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream.
Error:  -> [Help 1]
Error:  
Error:  To see the full stack trace of the errors, re-run Maven with the -e switch.
Error:  Re-run Maven using the -X switch to enable full debug logging.
Error:  
Error:  For more information about the errors and possible solutions, please read the following articles:
Error:  [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
Error:  
Error:  After correcting the problems, you can resume the build with the command
Error:    mvn <args> -rf :client-java-extended
Error: Process completed with exit code 1.

[yue9944882]

ref https://github.com/kubernetes-client/java/actions/runs/6269461668/job/17025913694?pr=2797

[brendandburns]

/lgtm
/approve

[k8s-ci-robot]

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This pull-request has been approved by: brendandburns, yue9944882

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