[DRE-maint] Bug#983346: Update gitlab to 13.7.7 (installation fails - need help)

[Pirate Praveen]

On Fri, 26 Feb 2021 14:40:46 +0530 Pirate Praveen 
<praveen at onenetbeyond.org> wrote:
 > On Tue, 23 Feb 2021 00:47:30 +0530 Pirate Praveen
 > <praveen at onenetbeyond.org> wrote:
 >  > Installing 13.7.7 on a clean system (after purge) works, but fails
 > when
 >  > upgrading from 13.6.7.
 >
 > What I found out so far is this,
 >
 > /etc/gitlab/initializers/flipper.rb was obsoleted in 13.6 but we did
 > not remove it and that code introduced some changes in db which is 
now
 > causing the error. So I think we will have to revert the changes made
 > by this initializer.
 >
 > And in long term, we should more actively look for obsolete
 > initializers like how we check if upstream file list is changed
 > upstream.

This commit makes the upgrade work.

https://salsa.debian.org/ruby-team/gitlab/-/commit/98741d55b7ed4b5eb1985981ab82e171c7d0e0c9

We still need to check obsolete initializers more proactively I think.