Add basic network setup to Autoyast export

Make sure that the automatic network setup created during the Stage 1
installation is kept since Machinery has no network inspector.
Add additional systemd states to Factory

Make sure to also generate descriptions with static and masked
services and also sockets.
Filter unsupported systemd services by default in Autoyast

Masked and static are not supported by Yast. It might also have issues
with the ".service" ending so we are removing it.
Make the exported autoyast profiles readable for all

Most HTTP servers run as a different user so having a restricted
mode configuration as for the machinery profiles doesn't make much
sense for an exported directory.
Filter log files from Autoyast export

There is an issue with a hanging gzip process if we export the log
files. Since they are not really needed in a newly built system we
filter them for Autoyast.
Fix Autoyast service creation
Automatically determine autoyast url
Merge pull request #439 from SUSE/fix_remaining_autoyast_issues

Fix remaining autoyast issues