Revert "优化"

This reverts commit a739161a9e8c9a56df035621aaa30b365f31fbe3

mooctest-site-server/src/main/java/cn/iselab/mooctest/site/web/logic/impl/GroupLogicImpl.java

@@ -351,7 +351,7 @@ public class GroupLogicImpl extends BaseLogic implements GroupLogic {
                User.class, params);
         Group group = groupService.getGroup(groupId);
         if(result.size()>(group.getClassSize()-groupService.getWorkerCount(groupId))){
-            throw new HttpBadRequestException("批量添加人数超出班级上限");
+            throw new HttpBadRequestException("批量导入人数超出班级上限");
         }
         List<UserVO> batchAddList=new ArrayList<>();
         for(User user:result){