nebraska: Prepare unittests for move to chromite.

Also fix new nebraska lint errors.

BUG=chromium:1003986
TEST=./run_unittests
copy into chromite, soft link to scripts/wrapper.py, and run unittest
cros flash --debug --clear-cache ssh://100.90.29.199 xBuddy://remote/kevin-release/R79-12591.0.0

Change-Id: I1aa4f96ac31b26b243762fcb60df34ff17d6d07f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/1862214
Tested-by: Achuith Bhandarkar <[email protected]>
Commit-Queue: Achuith Bhandarkar <[email protected]>
Reviewed-by: Amin Hassani <[email protected]>
2 files changed