chromite: Add a service account to chump detector

It looks like there's a new service account being used to commit
changes in the Pre-CQ; see the committer of CL:*228108. It was marked as
a chump. This change adds the new email address to the chump detector.

BUG=chromium:525312
TEST=unittests still pass.

Change-Id: I11f352329abd7c0659aef3b3d21a3aa7dc8694d7
Reviewed-on: https://chromium-review.googlesource.com/295699
Commit-Ready: Paul Hobbs <phobbs@google.com>
Tested-by: David James <davidjames@chromium.org>
Reviewed-by: David James <davidjames@chromium.org>
1 file changed