Comment # 4 on bug 1190864 from Jos��� Iv���n L���pez Gonz���lez

Fixed by yast2-users 4.4.7. Now, useradd -D command is used to get the default
useradd config.

* https://github.com/yast/yast-users/pull/347
* https://build.opensuse.org/request/show/926204
* https://build.suse.de/request/show/256597