Pre Merge pull request !398 from D哥/N/A

多半是官方误删了，把<if test="userName != null and userName != ''">user_name,</if>这一行补上去

Signed-off-by: D哥 <12271764+darrenteng@user.noreply.gitee.com>

ruoyi-modules/ruoyi-system/src/main/resources/mapper/system/SysUserMapper.xml

@@ -146,6 +146,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
  		insert into sys_user(
  			<if test="userId != null and userId != 0">user_id,</if>
  			<if test="deptId != null and deptId != 0">dept_id,</if>
+            <if test="userName != null and userName != ''">user_name,</if>
  			<if test="nickName != null and nickName != ''">nick_name,</if>
  			<if test="email != null and email != ''">email,</if>
  			<if test="avatar != null and avatar != ''">avatar,</if>