We load it, but disable all the warnings by default.  People can
re-enable the warnings for their modules if they want, but there
is way too much broken code in the tree currently.

Bug: 738534
Test: ran each pylint version by hand on some bad code
Change-Id: Ia5b24093f18febd452f4c1eed6e82044544161bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1958849Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>