@Override
	public void setLoadBalancer(ILoadBalancer lb) {		
		super.setLoadBalancer(lb);
		subRule.setLoadBalancer(lb);
	}
Given that
{@link IRule} can be cascaded, this {@link RetryRule} class allows adding a retry logic to an existing Rule.

@author stonse
ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/RetryRule.java