This update for yast2-firstboot fixes the following issues:

- Improve the "firstboot_licenses" client to give precedence to
the directory argument, allowing to use it multiple times to show
different licenses (bsc#1154708).
- Add firstboot.rnc to the desktop file (related to bsc#1156905).
- Remove the references to the already dropped automatic
configuration feature (FATE#314695).

This update was imported from the SUSE:SLE-15-SP1:Update update project.