private static long getRefreshIntervalMs(IClientConfig clientConfig) {
        return clientConfig.get(CommonClientConfigKey.ServerListRefreshInterval, LISTOFSERVERS_CACHE_REPEAT_INTERVAL);
    }
A default strategy for the dynamic server list updater to update.
(refactored and moved here from {@link com.netflix.loadbalancer.DynamicServerListLoadBalancer})

@author David Liu
ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/PollingServerListUpdater.java