One of the last dependency updates gitlab-ce requires, has broken the Gemfile.lock generation for user git.
I use now a work-around to generate the file as user root and change the ownership back to git.
This commit can maybe be undone if the source of the problem is fixed.

PR: 232791
Reported by: freebsd@felix.flornet.de
Approved by: mentors (implicit)
MFC after: 1 day
MFH: 2018Q4