GitLab

See https://gitlab.com/gitlab-org/prometheus-client-mmap/issues/24

atomic 1.1.100 was yanked by its author.

Adding the :prometheus tag to an rspec test will clear out
memory-mapped files and reset the registry.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/39968

Signed-off-by: Rémy Coutable <remy@rymai.me>

This reverts the addition of the "goldiloader" Gem and all use of it.
While this Gem is very promising it's causing a variety of problems on
GitLab.com due to it eager-loading too much data in places where we
don't expect/can handle this. At least for the time being this means we
have to go back to manually fixing N+1 query problems, but at least
those should not cause a negative impact on availability.

Goldiloader (https://github.com/salsify/goldiloader) can eager load
associations automatically. This removes the need for adding "includes"
calls in a variety of different places. This also comes with the added
benefit of not having to eager load data if it's not used.

In Rails 5.0 `assert_template` and `assigns()` have been extracted to
the `rails-controller-testing` gem.
https://github.com/rails/rails/pull/20138/files

This commit adds this gem for rails5.

git 2.16 will fail badly if there are stale worktrees.

Closes #44115

Release notes: https://github.com/libgit2/libgit2/releases/tag/v0.27.0

This version solves a significant performance issue with generating
large diffs: https://github.com/libgit2/libgit2/issues/4460

Timecop was being used in the cycle analytics and burndown seed_fu tasks.
While it seems a little sketchy to use Timecop in this way, this seems like
an exception can be made for test fixtures.

Closes #44751, gitlab-org/gitlab-ee#5359

When a repository does not exist on a remote, Gitaly won't be able to
clone it. This is correct behaviour, but from the clients perspective a
change in behaviour.

This change implements the client side changes that allows Gitaly to
execute a `git ls-remote <remote-url> HEAD`. This way the client has no
need to shell out to Git.

In the situation where multiple Gitalies are available, one is chosen at
random.

This commit closes https://gitlab.com/gitlab-org/gitlab-ce/issues/43929,
while its also a part of https://gitlab.com/gitlab-org/gitaly/issues/1084

See:

* https://github.com/rails/rails-html-sanitizer/releases
* https://github.com/flavorjones/loofah/releases