[autotest] Merge DUT repair recommendations with board inventory.

Based on discussions with englab-sys-cros, this merges the
DUT repair recommendations with the full board inventory e-mail.

After the change, there are two distinct kinds of inventory
runs:
  * run-pool-inventory generates a pool inventory e-mail sent to the
    deputies, and generates the combined board and DUT repair
    recommendations e-mail for the englab team.
  * run-board-inventory generates a board inventory only, without
    repair recommendations, and sends it to the englab team.

BUG=None
TEST=run locally, examine the output

Change-Id: Ifc03560b637884f3abbfcd6561f614a9d2de7005
Reviewed-on: https://chromium-review.googlesource.com/276800
Tested-by: Richard Barnette <jrbarnette@chromium.org>
Reviewed-by: Dan Shi <dshi@chromium.org>
Commit-Queue: Richard Barnette <jrbarnette@chromium.org>
2 files changed