搜索默认排序条件改为按销量+id倒序排序

@@ -153,7 +153,7 @@ public class SearchSortHelper {
 
 	// 都要添加次要排序条件
 	private void addDeafultSortBuildSorts(List<SortBuilder> sortBuilders, List<String> filteredFieldNames) {
-		this.addSortBuildSorts(sortBuilders, filteredFieldNames, "firstShelveTime", SortOrder.DESC);
+		this.addSortBuildSorts(sortBuilders, filteredFieldNames, "salesNum", SortOrder.DESC);
 		this.addSortBuildSorts(sortBuilders, filteredFieldNames, "id", SortOrder.DESC);
 	}