code: @Override
  	public void openForTraffic(ApplicationInfoManager applicationInfoManager, int count) {
  		super.openForTraffic(applicationInfoManager,
  				count == 0 ? this.defaultOpenForTrafficCount : count);
  	}
docs: If
  {@link PeerAwareInstanceRegistryImpl#openForTraffic(ApplicationInfoManager, int)}
  is called with a zero argument, it means that leases are not automatically
  cancelled if the instance hasn't sent any renewals recently. This happens for a
  standalone server. It seems like a bad default, so we set it to the smallest
  non-zero value we can, so that any instances that subsequently register can bump up
  the threshold.