cq: update names/bucket of downstream recipe rollers.
cq: update names/bucket of downstream recipe rollers.

R=iannucci@chromium.org, 84cab74a96a175cf90ed68b8abab420352923e11@chromium.org

Bug: 780352
Change-Id: I8dd0a4f25807062bad6701a8182d54f4df4eab55
Reviewed-on: https://chromium-review.googlesource.com/754058
Commit-Queue: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@chromium.org>
Reviewed-by: Paweł Hajdan Jr. <84cab74a96a175cf90ed68b8abab420352923e11@chromium.org>

luci/recipes-py,luci/recipes-py