…to stop copy pasting test cases.

Fix LDAP config key name

See merge request gitlab-org/gitlab-ce!14739

Create idea of read-only database

Closes #37534

See merge request gitlab-org/gitlab-ce!14688

Create merge requests across a fork network

Closes #20097

See merge request gitlab-org/gitlab-ce!14422

So we can keep showing it to a user in his project page.

This uses the existing ForkedProjectLinks

The helper creates a fork of a project with all provided attributes,
but skipping the creation of the repository on disk.

When no fork network exists for the source projects, we create a new
one with the correct source

The fork network will keep track of the root project as long as it's
present.

Add CI build trace sections extractor

Closes #37970

See merge request gitlab-org/gitlab-ce!14511

# Conflicts:
#   db/schema.rb

Commenting on image diffs

Closes #35873 and #38559

See merge request gitlab-org/gitlab-ce!14061

Backport protected_branches_spec improvements from EE

See merge request gitlab-org/gitlab-ce!14745