fix: fix flaky test assertions in org.apache.helix.rest.server.TestResourceAssignmentOptimizerAccessor#testComputePartitionAssignment

[hofi1]

Issues

• My PR addresses the following Helix issues and references them in the PR description:

Fixes apache#2640

Description

The problem in this test is, that a json string gets directly asserted. JSON strings are equal, if it has the same content and structure. Not only the elements in the arrays can change, but also the elements in the same object can change place. This is not considered in the assertion and leads to a flaky test.

This problem was found by the NonDex Engine – to reproduce run

mvn -pl helix-rest edu.illinois:nondex-maven-plugin:2.1.1:nondex -Dtest=org.apache.helix.rest.server.TestResourceAssignmentOptimizerAccessor#testComputePartitionAssignment

Tests

No test have been written – one existing test has been updated.

• The following is the result of the "mvn test" command on the appropriate module:
  [INFO] ------------------------------------------------------------------------
  [INFO] BUILD SUCCESS
  [INFO] ------------------------------------------------------------------------
  [INFO] Total time: 02:53 min
  [INFO] Finished at: 2023-10-04T18:42:54-05:00

[zzjas]

You can consider if it makes sense to combine some of your PRs for helix into a larger one.

You can proceed to open a real PR. Once you open a real PR, please mark this tentative PR as Opened in your tentative_pr.csv file and also raise a PR to IDoFT marking this as Opened. Thanks!