Add contrib/balance_pool to allow manual pool balancing

Adding this to contrib because it's somewhat lacking, and because
it really needs to get converted to python.  Until then...

BUG=chromium:425775
TEST=Run the command without -x, look at the output

Change-Id: I56fd12003422939f901487a9390756dcf83b998b
Reviewed-on: https://chromium-review.googlesource.com/224851
Reviewed-by: Prashanth B <beeps@chromium.org>
Commit-Queue: Richard Barnette <jrbarnette@chromium.org>
Tested-by: Richard Barnette <jrbarnette@chromium.org>
1 file changed