Integration tests on wsl_setup variant should not write wsl.conf.
- This is a cleanup for SystemSetup per DEENG-134 and DEENG-139 - Default user should be set by the WSL launcher. - Shutdown/reboot actions also. - Added a structured form of communication between OOBE and launcher. - /run/launcher-command
1. updating testing system with the proper autoinstall schema 2. reconf mode testing included