Set initial root password by default
Set initial root password by default. Also, send it downstream to be used by end-to-end tests that use Omnibus images.
GitLab MR for using GITLAB_INITIAL_ROOT_PASSWORD
if set: gitlab!58090 (merged)
Related issue: https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/843
Edited by Sanad Liaquat