修改促销信息相关js bug

@@ -8,7 +8,7 @@
     lazyLoad = require('yoho.lazyload');
 
 var goodsSwiper,
-    $discountFolder = $('.goods-discount .discount-folder'),
+    $discountFolder = $('.goodsDiscount .discount-folder'),
     $discountArrow = $('.goodsDiscount .first-item span');
 
 
@@ -31,7 +31,7 @@ goodsSwiper = new Swiper('.banner-swiper', {
 
 
 //初始化goods-discount
-if (0 === $('.goods-discount .discount-folder').children().length) {
+if (0 === $('.goodsDiscount .discount-folder').children().length) {
     $discountFolder.css('display', 'none');
     $discountArrow.html('');
 }