搜索所有按时间排序的地方改为按真实上架时间排序

@@ -106,7 +106,9 @@ public class SearchSortHelper {
 			// do nothing
 		} else if (realSortField.equals("discount")) {
 			realSortField = "promotionDiscount";
-		} else {
+		} else if (realSortField.equals("shelve_time")) {
+			realSortField = "firstShelveTime";
+		}else {
 			realSortField = CharUtils.underlineToCamelhump(realSortField);
 		}
 		if (realSortField.equalsIgnoreCase("score")) {