NIFI-15764 - Fix flaky test ClusteredConnectorAssetsIT.testSynchronizeConnectorAssets

[pvillard31]

Summary

NIFI-15764 - Fix flaky test ClusteredConnectorAssetsIT.testSynchronizeConnectorAssets

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[exceptionfactory]

Thanks @pvillard31, these changes align with existing settings for other methods in the test utility class. +1 merging