Switch recipes-py CQ to Gerrit
Switch recipes-py CQ to Gerrit

Bug: 726507
Change-Id: Ibec79f034bfa02c3e1ce5c5d979aeebde71f8d9a
Reviewed-on: https://chromium-review.googlesource.com/607245
Reviewed-by: Daniel Jacques <8400006a9338a0893dca0101ad49838955bd6b2c@chromium.org>

luci/recipes-py,luci/recipes-py