Added iperf and netperf to DUTs, cleaned modems

BUG=chromium:272493
TEST=run_all_tests.py

Change-Id: Iec34502f4a8b8cfec2cac8458350556566710b4b
Reviewed-on: https://chromium-review.googlesource.com/182871
Reviewed-by: Ben Chan <benchan@chromium.org>
Tested-by: Byron Kubert <byronk@chromium.org>
Commit-Queue: Byron Kubert <byronk@chromium.org>
14 files changed