void shutDownProgressTaskService() {
      if (!isValid()) {
        LOG.warn("ProgressHelper uninitialized. Bailing on scheduleProgressTaskService()");
        return;
      }
      try {
        progressHelperClass.getDeclaredMethod("shutDownProgressTaskService").invoke(progressHelper);
        LOG.debug("shutDownProgressTaskService() called!");
      }
      catch (Exception exception) {
        LOG.warn("Could not shutDownProgressTaskService.", exception);
      }
    }
This provides the ability to pass things into TezProcessor, which is normally impossible
because of how Tez APIs are structured. Piggyback on ExecutionContext.
ql/src/java/org/apache/hadoop/hive/ql/exec/tez/TezProcessor.java