GitLab

This cl should not change any logic. Lucicfg tool had an update and
caused 'lucicfg fmt' changed.
This cl enabled lint, fixed some lint issues, and generated changes
after running 'lucicfg fmt' inside infra/config.

Change-Id: Id6b8cbde334075c2b549337eb12ee819f3ece211
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2316795
Commit-Queue: Sven Zheng <svenzheng@chromium.org>
Reviewed-by: Garrett Beaty <gbeaty@chromium.org>
Auto-Submit: Sven Zheng <svenzheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#794878}