Merge branch '20200324'

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

@@ -477,7 +477,7 @@
                cg.total_class_times_,
                cg.expect_student_num_,
                cg.student_num_,
-               su.username_                                      teacher_name_,
+               su.real_name_                                      teacher_name_,
                su.avatar_,
                t.introduction_,
                s.name_                                           address_,