[autotest] Add a new tool for automating DUT deployment.

The new tool automates the following operations for a given
list of DUTs/board:
  * Basic sanity testing of each DUT+Servo assembly.
  * Installation of the initial test image on each DUT.
  * Creation of the AFE database entries for the DUTs.
  * Assigning the DUTs to their initial pools.
  * Setting the stable repair version for the board.

BUG=chromium:522713
TEST=Run against DUTs borrowed from the lab using a local instance

Change-Id: I59dd00de996898b3ec9fd953c45bc9c21e2c3441
Reviewed-on: https://chromium-review.googlesource.com/282766
Commit-Queue: Richard Barnette <jrbarnette@chromium.org>
Tested-by: Richard Barnette <jrbarnette@chromium.org>
Reviewed-by: Dan Shi <dshi@chromium.org>
4 files changed