班级加学员，更换老师增加通讯录

mec-biz/src/main/java/com/ym/mec/biz/service/impl/ClassGroupServiceImpl.java

@@ -2989,6 +2989,7 @@ public class ClassGroupServiceImpl extends BaseServiceImpl<Integer, ClassGroup>
         
         imGroupService.create(classGroup.getId().longValue(), musicGroup.getTeamTeacherId(), classGroup.getName(), musicGroup.getName(), musicGroup.getName(), musicGroup.getName(), null, "MUSIC");
         imGroupMemberService.join(classGroup.getId().longValue(), userRoleMap);
+        imUserFriendService.classGroupAddStudent(classGroup.getId(),userIds);
         return true;
     }