提高班加入IM，改成批量模式

mec-biz/src/main/resources/config/mybatis/ClassGroupStudentMapperMapper.xml

@@ -183,7 +183,7 @@
         WHERE cgsm.music_group_id_ = #{musicGroupId}
         AND cgsm.user_id_=#{userId}
         AND cg.type_ = #{type,typeHandler=com.ym.mec.common.dal.CustomEnumTypeHandler}
-        AND cgsm.status_='NORMAL'
+        AND FIND_IN_SET(cgsm.status_,'NORMAL,LEAVE')
     </select>
     <select id="findClassGroupIdByUserAndCourseDateAndStatus" resultType="int">
         SELECT