修复考试次数从2开始的bug

examcloud-core-oe-admin-api-provider/src/main/java/cn/com/qmth/examcloud/core/oe/admin/api/controller/ExamScoreController.java

@@ -176,7 +176,7 @@ public class ExamScoreController extends ControllerSupport {
             return canExamTimes + 1;
         }
 
-        return usedExamNum + 1;
+        return usedExamNum;
 
     }