apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/config/BizConfig.java/BizConfig/releaseMessageCacheScanInterval
class BizConfig:  public int releaseMessageCacheScanInterval() {
    int interval = getIntProperty("apollo.release-message-cache-scan.interval", DEFAULT_RELEASE_MESSAGE_CACHE_SCAN_INTERVAL);
    return checkInt(interval, 1, Integer.MAX_VALUE, DEFAULT_RELEASE_MESSAGE_CACHE_SCAN_INTERVAL);
  }