Native Unicode Emojis - EE merge edition

See merge request !1369

Backport "Simplify project payload exposed on Environment endpoints in V4"

See merge request !1345

Fix LDAP DN case-mismatch bug in LDAP group sync

Closes #1338

See merge request !1337

Fixing some preexisting issues (Safari) and some new issues (Windows
Firefox)

Maintain emoji line-height in it's context to avoid cut-off,
(Windows 10) http://i.imgur.com/xmdOLgv.png

This also allows us to get rid of the small bodge for the cut-off in
Safari

It was pulling
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/watch

 - gl_emoji for falling back to image/css-sprite when the browser
   doesn't support an emoji
 - Markdown rendering (Banzai filter)
 - Autocomplete
 - Award emoji menu
    - Perceived perf
    - Immediate response because we now build client-side
 - Update `digests.json` generation in gemojione rake task to be more
   useful and  include `unicodeVersion`

MR: !9437

See issues

 - #26371
 - #27250
 - #22474

Only group owners can set ldap overrides

See merge request !1025

In a few circumstances, we saw that the LDAP person would
present the DN in one mix of case while a given LDAP group
member DN list would return the DN in another mix of case.
LDAP group sync was unable to make the match between these
members and it caused created/updated timestamp to be reset
and LDAP overrides to be ignored.

Port of api-drop-subscribed to EE

See merge request !1364

Parallelise the gitlab:elastic:index_database Rake task

See merge request !1361

Update project list API returns with approvals_before_merge attribute.

See merge request !1245

Empty state for deploy boards

Closes #1814

See merge request !1342

Protected branches dropdown headers

Closes #1294

See merge request !1114

Port of 26847-api-pipelines-use-basic to EE

See merge request !1181

* master:
  Rename query parameter to `membership`
  Add filter param for authorized projects for current_user for V4
  Rebase - fix commiter email & name

Rebase - fix commiter email & name

Closes #818

See merge request !1341

Port of "Add filter param for user's authorized projects in V4 "

See merge request !1347

Expose pipelines as PipelineBasic `projects/:id/pipelines`

The `projects/:id/pipelines` exposed a lot of extra details
that are superfluous and it was taking extra resources to fetch them.

To get more details about a pipeline, use
`projects/:id/pipelines/:pipeline_id`.

* master:
  Remove .es6 from file extensions (!1344)
  Remove .es6 from import statements
  Adjust ESLint rule for file names
  Detect invalid roll out status requests
  Merge 'commons-chunk-plugin' into 'commons-chunk-plugin-ee'
  Port of 'commons-chunk-plugin' to EE

Remove es6 file extension from JavaScript files

See merge request !1344

Detect invalid roll out status requests

See merge request !1358

Port of 'commons-chunk-plugin' to EE

See merge request !1354