Fixed failing tests with ajax spinner

See merge request !1317

API: Return 400 for all validation erros in the mebers API

See merge request !1311

Port of "remove-require-context-application-bundle" to EE

See merge request !1298

Deploy boards

Closes #1589

See merge request !1233

Port of dm-fix-web-edit-new-lines to EE

See merge request !1248

remove Turbolinks from lockfile.js, do page refresh instead

See merge request !1299

Enable the RSpec/BeEql cop

See merge request !1295

Deleting a user shouldn't delete associated issues.

See merge request !862

* master:
  Remove ProjectGitHook API
  Document how to use filter-branch to reduce the repo file size

Remove ProjectGitHook API

Closes #1791

See merge request !1301

Document how to use filter-branch to reduce the repo file size

Closes #1270

See merge request !914

[ci skip]

* master: (467 commits)
  Fix the filtered search
  Resolve merge conflicts
  Fit GitAccess specs
  Fix new offenses
  Fix new offenses
  Stylistic tweaks
  Remove stray conflict
  Fix OAuth/SAML user blocking behavior
  Revert "Enable Style/DotPosition"
  Revert "Prefer leading style for Style/DotPosition"
  Revert "Enable Style/BarePercentLiterals"
  Manually correct autocorrect
  Move up delegate calls
  Exclude migrations from Style/MutableConstant
  ActiveSupport delegation is preferred over Forwardable
  Update haml_lint to work with newest rubocop
  Fix incorrect rubocop autocorrects
  Regenerate .rubocop_todo.yml for EE
  Fix EE offenses
  Add explanations to cops
  ...

CE upstream: Thursday

See merge request !1293