Add support for closing epics

Closes #7340, #3678, and #7013

See merge request gitlab-org/gitlab-ee!7302

Correct GitLab capitalization in EE-only files

See merge request gitlab-org/gitlab-ee!7440

Refactor IDE index to support EE specific code

See merge request gitlab-org/gitlab-ee!7473

Port of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/21748

See merge request gitlab-org/gitlab-ee!7402

**Why?**

- The web terminal feature is EE specific and will need to inject
  some specific options / functions into certain components.

Add data model and migration for vulnerabilities

See merge request gitlab-org/gitlab-ee!6896

Check push rules against commit author for web-based merges

Closes #7622

See merge request gitlab-org/gitlab-ee!7468

[EE]  Post a commit note with the downstream pipeline URL for omnibus triggers

See merge request gitlab-org/gitlab-ee!7274

Refactor scripts/trigger-build and post a commit note with the downstream pipeline URL for omnibus triggers
Signed-off-by: Rémy Coutable <remy@rymai.me>

We remove this feature as it never worked properly

CE upstream - 2018-09-24 11:15 UTC

See merge request gitlab-org/gitlab-ee!7464

Redirect old Maven docs to new location

See merge request gitlab-org/gitlab-ee!7462

# Conflicts:
#	app/assets/javascripts/boards/index.js
#	app/assets/javascripts/pipelines/components/graph/graph_component.vue
#	app/assets/javascripts/pipelines/components/graph/stage_column_component.vue
#	doc/install/requirements.md

[ci skip]

Upgrade eslint (EE port)

See merge request gitlab-org/gitlab-ee!7422

Upgrade eslint to v5.x

See merge request gitlab-org/gitlab-ce!21825

Change the tier badge of Geo to be PREMIUM

See merge request gitlab-org/gitlab-ce!21877

Change the tier badge of Geo to be PREMIUM

See merge request gitlab-org/gitlab-ee!7461

Update popover URL to point to help page of same domain

Closes #7307

See merge request gitlab-org/gitlab-ee!7446

Increase performance when creating discussion on diff

Closes #49002

See merge request gitlab-org/gitlab-ce!21743

Fixes WIP text with two different colors in MR edit page

Transforms a `p` element in a `div` to guarantee WIP
the explanation is rendered inside `text-muted`

See merge request gitlab-org/gitlab-ce!21740

[ci skip]

Add link to issue on epic

Closes #6318

See merge request gitlab-org/gitlab-ee!7407

Use gitlab-ui 1.5.1

See merge request gitlab-org/gitlab-ce!21865

CE upstream - 2018-09-21 21:21 UTC

See merge request gitlab-org/gitlab-ee!7456