buffet: Read config/state paths from commandline

This allows us to use custom paths and configurations in test without
altering normal system operation.

BUG=brillo:172
TEST=unittests

Change-Id: I1a969093683205d5f600ff88ebba8b22c05368b4
Reviewed-on: https://chromium-review.googlesource.com/247504
Tested-by: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
6 files changed
tree: 7069f630dfb08514a864e745d51c5b800d511fcc
  1. buffet/