Don't send emails on successful travis builds.
Don't send emails on successful travis builds.

See http://docs.travis-ci.com/user/notifications/#Email-notifications
for details.

alphagov/ci-puppet,alphagov/ci-puppet,boffbowsh/ci-puppet,alphagov/ci-puppet,boffbowsh/ci-puppet,boffbowsh/ci-puppet,boffbowsh/ci-puppet,alphagov/ci-puppet