@Override
  public void handleNotification(Notification notification, Object hb) {
    AdminDistributedSystemJmxImpl systemJmx = (AdminDistributedSystemJmxImpl) system;

    if (!systemJmx.isRmiClientCountZero()) {
      Helper.handleNotification(this, notification, hb);
    }
  }
Handles notification to refresh. Reacts by refreshing the values of this GemFireManager's
ConfigurationParamaters. Any other notification is ignored. Given notification is handled only
if there is any JMX client connected to the system.

@param notification the JMX notification being received
@param hb handback object is unused
geode-core/src/main/java/org/apache/geode/admin/jmx/internal/CacheServerJmxImpl.java