@Override
    public void destroy() {
      trigger.shutdownNow();
    }
Invokes audit triggers based on a cron schedule.
<OL>
<LI>computes delay = next slot - current time
<LI>schedules a out-of-balance audit task to be started after delay computed earlier
<LI>once the audit task completes, it repeats delay computation and task submission
geode-rebalancer/src/main/java/org/apache/geode/cache/util/AutoBalancer.java