fix bug

themis-business/src/main/java/com/qmth/themis/business/dto/ExamPropCountDto.java

@@ -1,5 +1,6 @@
 package com.qmth.themis.business.dto;
 
+import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
 
 import java.io.Serializable;
@@ -13,6 +14,7 @@ import java.util.Set;
  * @Author: wangliang
  * @Date: 2020/8/19
  */
+@ApiModel("考试属性统计返回信息")
 public class ExamPropCountDto implements Serializable {
 
     @ApiModelProperty(name = "考试id")