Don't add plus-role suffix to the email sender.
Don't add plus-role suffix to the email sender.

BUG=439619
R=agable@chromium.org

Review URL: https://codereview.chromium.org/793883004

nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra