Comment # 70 on bug 1030873 from Dominique Leuenberger

I think we can close this by now:

* the role based selector does not need to worry for it
* lightdm no longer reads /etc/sysconfig/windowmanager, but relies on
/usr/share/xsessions/default.desktop, which in turn is handled by
update-alternatives

As can be seen in openQA, the lxde tests are back to functional since those
changes were introduced, meaning autologin for lxde is back operational oto