* master:
Move CI admin builds and runners specs to correct directory
Fix 500 when viewing specific runners on runners page
Fix Ci::Project migration not migrating columns that cannot be NULL
Fix MySQL migration of CI emails
Minor fix in flow 'Merge when build succeeds'
* master: (66 commits)
Fix runners admin view
Fix migrations
Rename mention of gitlab-git-http-server to gitlab-workhorse
Bump Redis requirement to 2.8 for Sidekiq 4 requirements
Fix wording on runner setup page
add details on how to change saml button label
Fix tests
Move awards back to gray panel and few improvements to sidebar
Few UI improvements to new sidebar implementation
Fix tests for new issuable sidebar
Update changelog
Implement new sidebar for merge request page
Make edit link on issuable sidebar works
Redesign issue page for new sidebar
Move awards css to separate file
Implement issuable sidebar partial
Update CHANGELOG
Clarify cache behavior
Run builds from projects with enabled CI
Use Gitlab::Git instead of Ci::Git
...
Conflicts:
db/schema.rb
refactor login as to be impersonation with better login/logout
Modifies the existing "login as" feature to be called impersonation.
This also adds:
* Application keep track of who is impersonating the user so they can revert back to the original user without having to log out.
* Stores the user profile via `HTTP_REFERER` so you get redirected back to the person you have impersonated once you stop.
## Screenshots:


See merge request !1702
Implement Build Artifacts
This implements #3028
1. It stores artifacts in shared/artifacts,
1. It adds `artifacts` to `.gitlab-ci.yml`,
1. We use GitLab Workhorse to offload artifacts uploading,
1. To download artifacts it uses GitLab Workhorse X-Sendfile extension,
1. There's one "artifact" per-build. The new upload removes previous one and creates a new one,
1. Default max artifact size is set to 100MB - this can be changed in settings.
Missing things:
1. Support for `.gitlab-ci.yml`: `artifacts: true or git-ls-files` which will upload all non tracked files,
1. Artifacts passing between builds.
GitLab Workhorse changes: https://gitlab.com/gitlab-org/gitlab-workhorse/merge_requests/5
GitLab Runner changes: https://gitlab.com/gitlab-org/gitlab-ci-multi-runner/merge_requests/46
Syntax:
```
artifacts:
untracked: true # default: false
paths: # default: empty
- bin/files
```
See merge request !1584
- Offloads uploading to GitLab Workhorse
- Use /authorize request for fast uploading
- Added backup recipes for artifacts
- Support download acceleration using X-Sendfile
Modifies the existing "login as" feature to be called impersonation, as
well as keeping track of who is impersonating to revert back to that
user without having to log out.