Bump nginx to 1.12.1
Closes: #2591
/cc @briann
Build running at : https://dev.gitlab.org/gitlab/omnibus-gitlab/pipelines/55451
Edited by Balasankar C
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Closes: #2591
/cc @briann
Build running at : https://dev.gitlab.org/gitlab/omnibus-gitlab/pipelines/55451