@Override
  public void setConf(Configuration conf) {
    if (util != null) {
      throw new IllegalArgumentException(
        "setConf not supported after the test has been initialized.");
    }
    util = new IntegrationTestingUtility(conf);
  }
Look for jars we expect to be on the classpath by name.
hbase-it/src/test/java/org/apache/hadoop/hbase/mapreduce/IntegrationTestTableMapReduceUtil.java