Fix tests

* master: (28 commits)
  Merge branch 'jej-23867-use-mr-finder-instead-of-access-check' ...
  Merge branch 'html-safe-diff-line-content' into 'security'
  Merge branch 'rs-filter-authentication_token' into 'security'
  Merge branch 'destroy-session' into 'security'
  Updating reference to database password
  Update CHANGELOG.md for 8.13.9
  Update CHANGELOG.md for 8.14.4
  Don't check if stage name doesn't exist
  Various small emoji positioning adjustments
  Add nested groups support on data level
  Update factory_girl_rails to 4.7.0
  Correct previous stable branch used in 8.14 to 8.15 update guide
  Enable display of admonition icons in Asciidoc.
  add link_to_if helper on target_branch link on Merge Request ...
  Fade out should be white instead of gray
  Do nothing if file is undefined
  fix: 24982- Remove'Signed in successfully' message After this ...
  adds impersonator variable and makes sudo usage overall more clear
  Reenables /user API request to return private-token if user is ...
  Fixed timeago re-rendering every element
  ...

Fixed Wrong Tab Selected When Loggin Fails And Multiple Login Tabs Exists

## What does this MR do?
Fixes issue: 15081 Wrong Tab Selected When Loggin Fails And Multiple Login Tabs Exists
This is done by saving into a cookie when the active tab changes and by always selecting that tab when the page is loaded.
## Are there points in the code the reviewer needs to double check?
No
## Why was this MR needed?
In order to fix the issue: 15081
## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?


Closes #15081

See merge request !7314

Updating reference to database password

## What does this MR do?

Updates references to postgresql['sql_password'] to use gitlab_rails['db_password'] instead. Original value is not used anywhere. For gitlab-org/omnibus-gitlab#1392 we're using gitlab_rails['db_password'] to create a .pgpass as needed.

See merge request !8000

Add nested groups support on data level

## What does this MR do?

- [x] Add  `parent_id` field to `Namespace`model. 
- [x] Create new database table `routes` that keeps information about full path to each group or project
- [x] Remove uniq index from `namespaces.path`
- [x] Add uniq index on `routes.path`
- [x] Fill routes table with path data from namespaces and projects
- [x] Change Namespace/Project URL lookup by routes table
- [x] Rename related routes (nested groups, projects) when parent path changes

This is solely backend preparation. UI, Permissions and API support will be added in separate merge request.   
 
## Are there points in the code the reviewer needs to double check?

migrations, Route model, Routable concern

Will require downtime. See https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7121#note_19490281 discussion

## Why was this MR needed?

One step further to full nested groups support

## Screenshots (if relevant)

No UI changes in this merge request so far

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG.md) entry added~~
- ~~[Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)~~
- ~~API support added~~
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ce/issues/2772

See merge request !7121

Replace MR access checks with use of MergeRequestsFinder

Split from !2024 to partially solve https://gitlab.com/gitlab-org/gitlab-ce/issues/23867

⚠ - Potentially untested
💣 - No test coverage
🚥 - Test coverage of some sort exists (a test failed when error raised)
🚦 - Test coverage of return value (a test failed when nil used)
✅ - Permissions check tested

- [x] 💣  app/finders/notes_finder.rb:17
- [x] ⚠  app/views/layouts/nav/_project.html.haml:80 [`.count`]
- [x] 💣  app/controllers/concerns/creates_commit.rb:84
- [x] 🚥  app/controllers/projects/commits_controller.rb:24
- [x] 🚥  app/controllers/projects/compare_controller.rb:56
- [x] 🚦  app/controllers/projects/discussions_controller.rb:29
- [x] ✅  app/controllers/projects/todos_controller.rb:27
- [x] 🚦  app/models/commit.rb:268
- [x] ✅ lib/gitlab/search_results.rb:71

- [x] https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/2024/diffs#d1c10892daedb4d4dd3d4b12b6d071091eea83df_267_266 Memoize ` merged_merge_request(current_user)`
- [x] https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/2024/diffs#d1c10892daedb4d4dd3d4b12b6d071091eea83df_248_247 Expected side effect for `merged_merge_request!`, consider `skip_authorization: true`.
- [x] https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/2024/diffs#d1c10892daedb4d4dd3d4b12b6d071091eea83df_269_269 Scary use  of unchecked `merged_merge_request?`

See merge request !2033

Don't accidentally mark unsafe diff lines as HTML safe

Fixes potential XSS issue when a legacy diff note is created on a merge
request whose diff contained HTML

See https://gitlab.com/gitlab-org/gitlab-ce/issues/25249

See merge request !2040

Add authentication_token to filter_parameters list

See merge request !2041

Destroy a user session when they delete their own account via browser

This patch destroys a user's session when they delete their own account
using a browser. A new session is created as they are redirected to the
sign_in page.

Issue: https://gitlab.com/gitlab-org/gitlab-ce/issues/25015

See merge request !2042

Fix JS error when reseting new issue template

Fixes JS error when trying to reset template when no template has been set.

See merge request !7978

postgresql['sql_password'] is not used, should be
gitlab_rails['db_password']

Fade out should be white instead of gray

Currently, you can see the hard edge of the fade out because it's a light shade of gray rather than white.   
Before:   
![Screen_Shot_2016-12-07_at_12.36.10_PM](/uploads/c8fd2c6ba1742d1260614fd4c9cb29c9/Screen_Shot_2016-12-07_at_12.36.10_PM.png)
After:   
![Screen_Shot_2016-12-07_at_12.35.53_PM](/uploads/52b51e4a825658a0c440e0f1fb86a31c/Screen_Shot_2016-12-07_at_12.35.53_PM.png)
cc @nmrony

See merge request !7979

Various small emoji positioning adjustments

## What does this MR do?
It changes various emoticon related css rules with very small minor tweaks of 1 or 2 px

## Are there points in the code the reviewer needs to double check?
-

## Why was this MR needed?
aesthetics

## Screenshots (if relevant)
-


## Does this MR meet the acceptance criteria?

- [X] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [ ] All builds are passing
- [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
none

See merge request !7993

Fixed timeago re-rendering every element

## What does this MR do?

Fixes an issue when new notes are added timeago will be initialised for every timeago element on the page again and therefore adding more timeouts.

See merge request !7969

* build-statuses:
  Revert some unneeded changes
  Add action_class/action_title
  Rename icon_with_label to icon_with_description
  Fix auto loading of constants for Ci Statuses

[ci skip]

[ci skip]

Refine pipeline stages

## What does this MR do?

Introduces a concept of `Ci::Stage` to make it easier to have detailed statuses.

## Why was this MR needed?

This is needed to simplify the handling of `Ci::Statuses` and make the `Stage` actual concept in code:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7889

See merge request !7927

Remove wrong '.builds-feature' class from the MR settings fieldset

Closes #25171

See merge request !7930

Closes #24982

See merge request !7837

Don't whitelist events for all filter

Closes #24826

See merge request !7673

Remove unnecessary target branch link from MR page in case of deleted target branch

Fixes #24507

See merge request !7916

Shows group members in the project members list

Closes #24122

See merge request !7899