Change from `mail_room` to `gitlab-mail_room`

charlie ablettrequested to merge
cablett-gitlab-mail_room into master

Modify version from mail_room 0.9.1 to gitlab-mail_room 0.0.3

See:

gitlab!25869 (merged)

CNG MRs gitlab-org/build/CNG!393 (merged) gitlab-org/build/CNG!395 (merged)

Omnibus MR: omnibus-gitlab!3960 (merged)

Edited by charlie ablett

Merge request reports