Merge branch 'dev_v1.2.8' into dev_v1.2.9

merge

themis-business/src/main/resources/mapper/TEExamMapper.xml

@@ -24,7 +24,7 @@
     </select>
 
     <select id="examQuery" resultType="com.qmth.themis.business.dto.response.TEExamQueryDto">
-        select t.id,
+        select distinct t.id,
         t.code,
         t.name,
         t.tag,