protected void setRouter(Properties props, MockServerLayout serverLayout, NotificationSystem notificationSystem)
      throws Exception {
    setRouterWithIdConverterFactory(props, serverLayout, notificationSystem, null);
  }
Initialize and set the router with the given {@link Properties} and {@link MockServerLayout}
@param props the {@link Properties}
@param serverLayout the {@link MockServerLayout}.
@param notificationSystem the {@link NotificationSystem} to use.
ambry-router/src/test/java/com/github/ambry/router/NonBlockingRouterTestBase.java