webflux session屬性修改

org.springframework.web.server.session.WebSessionIdResolver

接口作爲session的產生接口，默認爲 cookie方式實現：

org.springframework.web.server.session.CookieWebSessionIdResolver

重新申明 此接口即可進行一些參數配置

    @Bean
    public WebSessionIdResolver webSessionIdResolver() {
        CookieWebSessionIdResolver resolver = new CookieWebSessionIdResolver();
        // 重寫定義 cookie 名字
        resolver.setCookieName("GATEWAY-SESSION");
        return resolver;
    }