Add path to ethtool on debian, redhat, archlinux and suse

(cherry picked from commit 5071e9ca9187ee6a84293fcbd71fae8dae09ac9c)

Conflicts:
	lib/3.7/paths.cf
Fixes #6550: add classes suffix _error in case of failed, denied or timeouted promise

(cherry picked from commit 5972114bd7fd039d308eb3870050265688f237e6)

Conflicts:
	lib/3.7/common.cf
Change: Fix windows bios inventory

Fix inclusion of PSComputername into System manufacturer
Add System serial number and System version support

Ref: https://dev.cfengine.com/issues/6378
Merge pull request #316 from nickanderson/3.6.x

Change: Fix windows bios inventory