Introduce CI/CD pipeline processing quotas

Closes #3493

See merge request gitlab-org/gitlab-ee!2986

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Fix GitLab QA: increase window size to ensure License link shows

See merge request gitlab-org/gitlab-ce!14674

Consolidate Geo upgrade instructions into one document

Closes #3628

See merge request gitlab-org/gitlab-ee!3057

Fix NoMethodErrors caused by incorrect module loading

Closes #3521

See merge request gitlab-org/gitlab-ee!3062

[EE] Fix the default branches sorting to actually be 'Last updated'

See merge request gitlab-org/gitlab-ee!2931

Use ActiveRecord::Tasks::DatabaseTasks directly in geo rake tasks

Closes #3543

See merge request gitlab-org/gitlab-ee!3019

Update a bunch of docs images

See merge request gitlab-org/gitlab-ee!3063

Fix removing the username from the git repository URL for pull mirroring

Closes #3588

See merge request gitlab-org/gitlab-ee!3060

Show errors when rebase onto target branch fails in the UI

Closes #1774

See merge request gitlab-org/gitlab-ee!2780

Add push_rules is_sample partial index

See merge request gitlab-org/gitlab-ee!2966

Add new push rule to reject unsigned commits

Closes #3285

See merge request gitlab-org/gitlab-ee!2913

GitLab QA fix: Adjust license key add for GitLab 10.0 changes

See merge request gitlab-org/gitlab-ee!3059

Closes #3628

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Adds scheduled import jobs to the stuck import jobs detection worker.

See merge request gitlab-org/gitlab-ee!3055

When this rule is enabled, all the new commits that have not been signed
through GPG will be rejected.

Update issue_board.md

See merge request gitlab-org/gitlab-ee!3054

Move Deploy Board screenshot at the top of the page

See merge request gitlab-org/gitlab-ee!3053