Use headless Google Chrome browser in GitLab QA

Closes gitlab-qa#45 and gitlab-qa#48

See merge request !11680

Rework project authorizations and nested groups for better performance

See merge request !10885

Add performance deltas between app deployments on Merge Request widget

Closes #27439

See merge request !11730

Add codeclimate.yml

See merge request !11757

Resolve "User autocomplete per_page does not work"

Closes #32977

See merge request !11742

Add missing cohorts to tab nav

See merge request !11766

Fix up some notes.js tech debt

See merge request !11283

Pass EE variable to trigger if defined

Closes #32918

See merge request !11710

Fix: Milestone - Participants list is showing duplicate assignees

Closes #32690

See merge request !11758

Fix failing spec in spec/requests/api/pipelines_spec.rb

Closes #33001

See merge request !11756

Duplicate gitaly init variables in 'default' file

Closes #31858

See merge request !11738

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

The spec was trying to sort pipelines by user ID, but the same user ID
was being used for each pipeline in the spec.

Closes #33001

Replace "build" with "job"

Closes #32994

See merge request !11746

Add missing project import job example from gitlab-ee

See merge request !7106

Close #32994

Apply responsive note styles to parallel diffs

See merge request !11701

Enable DuplicateProperty scss-lint

See merge request !11722

Merge branch '32447-remove-source-branch-is-displayed-to-mergers-who-cannot-actually-delete-the-source-branch-from-a-forked-project' into 'master'

Disable "Remove source branch" in MR Widget for users who can't remove, and re-add checkbox to MR form

Closes #32447 and #32907

See merge request !11558

Fix inspired while working on
https://gitlab.com/gitlab-org/gitlab-ce/issues/32801

More consistent padding of notes, system notes, and note form

See merge request !11720

Don't allow spaces in dependency linker value regex

See merge request !11721

Merge branch '31459-fix-transient-error-caused-by-small-timeout-also-adapt-tests-to-work-locally-correctly' into 'master'

Fix transient CI errors by increasing command execution timeouts from 1s to 30s

Closes #31459

See merge request !11420

Creates CI Header component to use in pipelines and job details pages

See merge request !11726

Enable final newline

See merge request !11723

Fix up tech debt comments from @jschatz1

 - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10837#note_28757436
 - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10837#note_28757905
 - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10837#note_28757952
 - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10837#note_28758013

Consistently display last push event widget

See merge request !11585

Fix counter cache invalidation

Closes #32854 and #32870

See merge request !11736

Postgresql 9.2 is the minimum version from GitLab 9.3, not 9.0

See merge request !11737