Umount fuse in tests
Umount fuse in tests

This corrects the order when the fuse mount is terminated by closing the
done channel: Before, restic would close the fuse connection and only
afterwards try to remove the mount, that does not work.

Closes #494

fawick/restic,middelink/restic,restic/restic,stuertz/restic,kurin/restic,ckemper67/restic,ar-jan/restic,kurin/restic,arithmetric/restic,ar-jan/restic,jayme-github/restic,byo/restic,jayme-github/restic,byo/restic,stuertz/restic,mappu/restic,fawick/restic,middelink/restic,restic/restic