Upgrade gitlab to 11.0.3 and fix problem with sidekiq-cron reported by swills which requires rubygem-rufus-scheduler version 3.4.0, alle other newer versions are failing.

PR: 229557
Reported by: swills
Reviewed by: tz (mentor)
Approved by: tz (mentor)
Differential Revision: https://reviews.freebsd.org/D16160