[moblab] Fix systeminfo_unittest that depended on chromite

Cleaning up systeminfo_unittest.testBlockDevice. Previously
relied on chromite, and needed to be rewritten to use plain
mocks instead.

BUG=chromium:815014
TEST=systeminfo_unittest.py

Change-Id: I7dfb4c4069b97a5c78a4f01705587407fd4c8b0a
Reviewed-on: https://chromium-review.googlesource.com/1033534
Commit-Ready: Matt Mallett <mattmallett@chromium.org>
Tested-by: Matt Mallett <mattmallett@chromium.org>
Reviewed-by: Keith Haddow <haddowk@chromium.org>
1 file changed
tree: 50ba56ef1b8c28dc0f2459bd124f8cd3364c380a
  1. COMMIT-QUEUE.ini
  2. OWNERS
  3. PRESUBMIT.cfg
  4. partner_ui/
  5. pylintrc
  6. scripts/
  7. src/