For pool inventory, only report boards with broken DUTs.

The e-mail generated by the run-pool-inventory script is rather
long, and a lot of the volume consists of boards that have no
problems.  So, for each pool, only report the boards that have at
least one broken DUT.

BUG=chromium:459770
TEST=Run the script manually

Change-Id: I35711e290b0e8ec20eedb900cdc61cd3a120d1d3
Reviewed-on: https://chromium-review.googlesource.com/251111
Tested-by: Richard Barnette <jrbarnette@chromium.org>
Reviewed-by: David James <davidjames@chromium.org>
Commit-Queue: Richard Barnette <jrbarnette@chromium.org>
1 file changed