edusoho用户信息权限划分

src/Biz/User/Register/Impl/BaseRegister.php
/src/AppBundle/Controller/Admin/UserController.php
/src/Biz/User/Dao/Impl/UserDaoImpl.php

ALTER TABLE `user` ADD `admin_id` INT NULL DEFAULT '0' COMMENT '添加管理员' AFTER `registerVisitId`;