private void populateRegion(int count) {
    Region<String, Integer> region = getRegion();
    for (int i = 1; i <= count; i++) {
      region.put("execKey-" + i, i);
    }
  }
Verify that AuthenticationRequiredException is not thrown when security-* properties are NOT
provided. We have to grep for this exception in logs for any occurrence.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/execute/DistributedRegionFunctionExecutionDUnitTest.java