Resolve "Geo: Automatically clean up stale lock files on Geo secondary"

Closes #5533

See merge request gitlab-org/gitlab-ee!6034

Use variables for authenticated example

See merge request gitlab-org/gitlab-ee!6038

Apply CE feature to EE: Resolve "Show `failure_reason` and improve failed jobs tab in pipeline detail view"

See merge request gitlab-org/gitlab-ee!6043

Apply CE feature to EE: Resolve "Show `failure_reason` and improve failed jobs tab in pipeline detail view"

Add approval widget support for zero approvals.

See merge request gitlab-org/gitlab-ee!6032

Add presets for navigating Epic Roadmap

Closes #4936

See merge request gitlab-org/gitlab-ee!5798

[EE] Customizable favicon

See merge request gitlab-org/gitlab-ee!5999

Add ability to have zero approvers

See merge request gitlab-org/gitlab-ee!5635

CE upstream - 2018-06-07 10:47 UTC

Closes gitlab-qa#268

See merge request gitlab-org/gitlab-ee!6029

Spell out all the words when matching ls-remote

See merge request gitlab-org/gitlab-ee!6030

Initial updates to multi_project_pipeline_graphs.md

See merge request gitlab-org/gitlab-ee!5725

Resolve "[Geo] Missing "\n" in rake geo:status"

Closes #6324

See merge request gitlab-org/gitlab-ee!6020

Consistently use tar lookup function (EE version)

See merge request gitlab-org/gitlab-ee!6010