修改题库中试题的难度值发生变化时，在卷库中点击整张试卷的保存时，卷库的难度值不会改变的bug

cqb-paper/src/main/java/com/qmth/cqb/paper/service/impl/PaperServiceImpl.java

@@ -252,16 +252,17 @@ public class PaperServiceImpl implements PaperService{
                                                              // 则要效验试卷名称唯一性
                 String msg = this.checkPaperName(paperExp.getName().trim(), user.getRootOrgId().toString());
                 if (msg == null) {
+                	formatPaper(oldPaper, user);
                     paperRepo.save(oldPaper);
                     msgMap.put("msg", "success");
                 } else {
                     msgMap.put("msg", msg);
                 }
             } else {
+            	formatPaper(oldPaper, user);
                 paperRepo.save(oldPaper);
                 msgMap.put("msg", "success");
             }
-
         }
         //删除缓存
         redisTemplate.delete(paperExp.getId());