eslint: Fix invalid filename validation

Attempt to fix the following error which is appearing in every new MR since `eslint-plugin-filenames` was introduced.

```
/builds/gitlab-org/gitlab-ce/app/assets/javascripts/gl_field_error.js.es6
  2:1  error  Filename 'gl_field_error.js.es6' does not match the naming convention  filenames/match-regex
```

This was happening because our ES6 files have the following structure `gl_hello_world.js.es6`. So `eslint-plugin-filenames` was considering as base name `gl_hello_world.js` which didn't pass the previous regex `^[a-z_]+$`

This new regex allows the following filenames to pass as valid:

- `gl_hello_world.js.es6` which base name translates to `gl_hello_world.js` 
-  `gl_foo_bar.js` which base name translates to `gl_foo_bar`
-  `d3.js` which base name translates to `d3` (especial case, maybe we should move this to the vendor dir and make the regex more specific)

See merge request !7281

Add new icon for skipped builds; show created state in mini graph

![Screen_Shot_2016-11-03_at_1.31.02_PM](/uploads/69be86d59f5939329cd869804e86cb87/Screen_Shot_2016-11-03_at_1.31.02_PM.png)
![Screen_Shot_2016-11-03_at_1.30.46_PM](/uploads/0d568ad94e3f072beb0728b402aa695a/Screen_Shot_2016-11-03_at_1.30.46_PM.png)

Closes #22914

See merge request !7276

Hides registry if project repository is disabled

## What does this MR do?

When disabling the projects repository it now hides the container registry as well.

## Screenshots (if relevant)

![Screen_Shot_2016-10-21_at_11.23.29](/uploads/e07d74e0666348748690689ab993f9d8/Screen_Shot_2016-10-21_at_11.23.29.png)

![Screen_Shot_2016-10-21_at_11.23.32](/uploads/e2f0757397a4524eca5aa069c1fabad3/Screen_Shot_2016-10-21_at_11.23.32.png)

## What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ce/issues/19734#note_17224181

See merge request !7036

Unify dropdown button styles

Unifies dropdown styles across app (use one shade of gray for border, always use caret instead of chevron)   
Before:
![Screen_Shot_2016-11-02_at_1.39.20_PM](/uploads/f0a2808c97aaa404626631683da32380/Screen_Shot_2016-11-02_at_1.39.20_PM.png)
After:   
![Screen_Shot_2016-11-02_at_1.39.45_PM](/uploads/cca0d40138d48f11cfc7183b202abad9/Screen_Shot_2016-11-02_at_1.39.45_PM.png)

Should affect _all_ dropdowns
![Screen_Shot_2016-11-02_at_1.35.12_PM](/uploads/73874a46d79144a7a854eab57030c2bc/Screen_Shot_2016-11-02_at_1.35.12_PM.png)

See merge request !7250

This allows us to pass .js.es6 files as valid filenames;

Add custom text to column

Before:   
![Screen_Shot_2016-11-03_at_9.46.27_AM](/uploads/ba26761b1e1a5af30b19aac88c0060a1/Screen_Shot_2016-11-03_at_9.46.27_AM.png)
After:   
![Screen_Shot_2016-11-03_at_9.46.20_AM](/uploads/a959a30a3e11ab64bb1412e662692f2b/Screen_Shot_2016-11-03_at_9.46.20_AM.png)



Closes #24133

See merge request !7269

Remove underline focus state on statuses

Before:   
![Screen_Shot_2016-11-02_at_9.21.03_AM](/uploads/60d49c0cde418b45ee245d1a60d6ece7/Screen_Shot_2016-11-02_at_9.21.03_AM.png)
After:   
![Screen_Shot_2016-11-02_at_9.20.43_AM](/uploads/820c91d961b01d775465671ebceeba98/Screen_Shot_2016-11-02_at_9.20.43_AM.png)

See merge request !7244

DRY up the bin/changelog specs

Depends on https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7252

See merge request !7253

Fixes #24102

See merge request !7267

Add and update .gitignore & .gitlab-ci.yml templates for 8.14

Following https://gitlab.com/gitlab-org/gitlab-ce/issues/24134

See merge request !7272

[ci skip]

Adds JavaScript validation for group path editing

## What does this MR do?

- Prevents group_edit form submission when special characters are included in the new group name
- Enhances gl_field_errors to support this use case and be more re-usable. 

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

**The implementation of validation is here: https://gitlab.com/gitlab-org/gitlab-ce/commit/73d997046cac376ccdbcaac6f183002bc19b9a1f**

The rest of the diff for this MR is augmenting gl_field_errors

## Why was this MR needed?

- Currently we allow submission and a 500 error is returned. 

## Screenshots (if relevant)
![2016-10-21_14.11.21](/uploads/2bef5764d3f2429dd0f900661153eef7/2016-10-21_14.11.21.gif)
## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG.md) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [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 https://gitlab.com/gitlab-org/gitlab-ce/issues/23564, https://gitlab.com/gitlab-org/gitlab-ce/issues/19756, https://gitlab.com/gitlab-org/gitlab-ce/issues/19736, https://gitlab.com/gitlab-org/gitlab-ce/issues/23922

See merge request !7041

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

Don't include Gitlab::Routing.url_helpers on top-level namespace (fix error for url_for)

## What does this MR do?

Tries to fix:

```
     ActionView::Template::Error:
      arguments passed to url_for can't be handled. Please require routes or provide your own implementation
```

One of the failed build: https://gitlab.com/gitlab-org/gitlab-ce/builds/5825797

See merge request !7265

Expose more info for SystemHooks

See merge request !6964

Update "Installation from source" guide for 8.14.0

Following the steps from https://gitlab.com/gitlab-org/release-tools/blob/master/doc/release-candidates.md#creating-rc1.

See merge request !7271

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

Fix symlink vulnerability in Import/Export

Replaces https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/2018 made by @james

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/23822

See merge request !2022
Signed-off-by: Rémy Coutable <remy@rymai.me>

Fix Import/Export foreign key issue to do with project members

Cleans-up any foreign keys in `ProjectMember` - same as we do with the rest of the models when importing.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/23837 and https://gitlab.com/gitlab-org/gitlab-ce/issues/23739

See merge request !2020
Signed-off-by: Rémy Coutable <remy@rymai.me>

[ci skip]

[ci skip]

Add a `--force` option to bin/changelog

See merge request !7252

Check that JavaScript file names match convention

## What does this MR do?

Introduce a new ESLint rule to check JavaScript file names.

## What are the relevant issue numbers?

fixes #23118

See merge request !7238

Updated Sortable JS plugin

## What does this MR do?

Updates Sortable JS plugin for issue boards. The older version stopped the issue cards being draggable.

## What are the relevant issue numbers?

Closes #23048

See merge request !6734

Removes spaces in log messages.

refs:
- 6f7ccea6
- 7121a58e
- f54bf003

none of them seem to have added extra space deliberately (commit message is about something else)

## Why was this MR needed?

The spaces caused confusion when trying to analyze the logs, there was no space in user name, but log message indicated there was.

See merge request !7223

Update examples in changelog docs to use single quotes around title

[ci skip]

See merge request !7246