Also, sort all the gerrit instances by url for clarity.

Change-Id: I89aea98f75de33e8673c929fb07df3b686ea6c15
Reviewed-on: https://chromium-review.googlesource.com/1228659
Commit-Queue: enne <enne@chromium.org>
Reviewed-by: Marc-Antoine Ruel <maruel@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>