Service desk automatic email response

Resources

Part of

https://gitlab.com/gitlab-org/gitlab-ee/issues/1675

When the external user submits an issue through email (#149 (moved)) or through the web (#1734), they get an automatic response email right away, confirming that the support request was submitted successfully, and pending human review.

Probably on the GitLab side, a comment is created automatically that represents this automatic response email.