private int createCacheServer() throws IOException {
    CacheServer cacheServer = getCache().addCacheServer();
    cacheServer.setPort(0);
    cacheServer.start();
    return cacheServer.getPort();
  }
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