Modify namespace name and path validation

## What does this MR do?

* Allow same namespace name with different parent_id
* Allow same namespace path. Uniq validation should be handled by routes table

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

migrations

## Why was this MR needed?

So we can use same name in different nesting like: 

```
gitlab-ce/foo
gitlab-com/foo
foo/gitlab-ce
```

## Screenshots (if relevant)

no

## Does this MR meet the acceptance criteria?

- ~~[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?

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

See merge request !8013

Merge Request - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8013

# Conflicts:
#   db/schema.rb

Add support for nested groups to admin routing

See merge request !8008

Updates the docs to require GitLab Shell 4.0.3

See merge request !8050

Detailed build statuses

## What does this MR do?

Implements detailed statuses for `Ci::Builds` and `CommitStatus`.

It also adds a new icon for manual build.

## Screenshots

![manual_builds_icon](/uploads/22b5c594350856c85398ef705a635f8b/manual_builds_icon.png)

## What are the relevant issue numbers?

See #24273, closes #22642

See merge request !7989

Fix wrong error message expectation in API::Commits spec

See commit message or https://gitlab.com/gitlab-org/gitlab-ce/issues/25651#note_19996076 for the explanation.

Closes #25651

See merge request !8083

Encode when migrating ProcessCommitWorker jobs

## What does this MR do?

This adds encoding logic to the migration for ProcessCommitWorker, ensuring it doesn't throw errors when the input can not be converted to UTF-8 without extra help.

## What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ce/issues/25489

See merge request !8064

Fix broken link for latest deployment

## What does this MR do?

Creates a new helper for the latest deployment link.

## Why was this MR needed?

A helper that returns a link was being called inside another helper that creates a link, resulting in  `builds/<a href="builds/ID>#id</a>`

## What are the relevant issue numbers?

Closes #25136

See merge request !7839

This was because the MR was a bit behind master and the error message
got updated in the meantime by 79aad815.
Signed-off-by: Rémy Coutable <remy@rymai.me>

Prevent overflow with vertical scroll when we have space to show content

## What does this MR do?
Removes vertical and horizontal scroll from builds, environments and pipelines tables by adding a media query since this is only necessary in smaller screens.

## Screenshots (if relevant)
![scroll](/uploads/6b9e3584df6e4ca29553d2ff576b794e/scroll.jpg)

## Does this MR meet the acceptance criteria?

- [ ] [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
  - [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 #20052

See merge request !8061

Backport hooks on group policies for the EE-specific implementation

See https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/822#note_19955431

See merge request !8066

Adds the ability to cherry pick a commit via the API. Right now it only supports to directly cherry pick a commit and not starting a MR from it. Shall we do that also for the API?

Closes #25450

See merge request !8047

For single line Git commit messages, the close quote should be on the same line as the open quote

_Originally opened at !7299 by @jzinn._

- - -

## What does this MR do?

Chomps merge commit messages so that there is not a dangling close quote.

A better solution would be not to use quotes at all, but to set off the message in a `<div>` with a background color.

## Screenshots (if relevant)

![Screen_Shot_2016-11-04_at_8.06.54_PM](/uploads/6e749c5227d88a9bfea64e70cccaf14a/Screen_Shot_2016-11-04_at_8.06.54_PM.png)

See merge request !7975

API: Memoize the current_user so that the sudo can work properly

Closes #25482

See merge request !8017

Replace the Spinach specs for admin settings with RSpec feature specs as per #23036 

Part of #23036

See merge request !8058

API: Ability to get group's project in simple representation

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/25412

See merge request !8060

If the source encoding is not UTF-8 we need to encode the data as
`JSON.dump` may throw an error if the input can not be converted to
UTF-8. We only encode when necessary to reduce the overhead.

Fixes gitlab-org/gitlab-ce#25489

Adds changelog

Add index to routes table on lower path for postgresql

Improve performance of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7121 

See merge request !8041

Signed-off-by: Rémy Coutable <remy@rymai.me>

Allow all alphanumeric characters in file names

## What does this MR do?

Allow more characters in file names such as Chinese symbols.

## Why was this MR needed?

It is annoying that some files which can be uploaded using Git CLI cannot be created with the web editor.

## What are the relevant issue numbers?

fixes #20190

See merge request !8002

added border-radius and padding to labels

## What does this MR do?

It creates a pill like style for labels.

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

## Why was this MR needed?
get a unique label look/style


## Screenshots (if relevant)
![image](/uploads/2cf347984ae4e36cd061c5a761ee99c9/image.png)
![image](/uploads/c23bbeba4b2525b4f36dac5a0fa1037c/image.png)


## Does this MR meet the acceptance criteria?

- [ ] [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?


Closes #25518

See merge request !8054

Minor improvements to nested groups code

See merge request !8011