@After
  public void tearDown() throws Exception {
    if (system != null) {
      system.disconnect();
    }
  }
Integration tests for log level control using {@link DistributionConfig} with lifecycle of
{@link DistributedSystem}.
geode-core/src/integrationTest/java/org/apache/geode/logging/internal/api/LogLevelChangesWithDistributedSystemIntegrationTest.java