We need to use a spy because an `after` RSpec hook is also going to call
the migration we want to test, so we need to use `have_received`
expectation. See gitlab-org/gitlab-ce#35351 for more details.

* master: (59 commits)
  Resolve "Clarify k8s service keys"
  Add Portuguese Brazil translations of Commits Page & Pipeline Charts
  Add Japanese Translation to i18n
  Update Prometheus gem to version that explicitly calls `munmap`
  Simplify width for dropdown-menu on mobile
  Update CHANGELOG.md for 9.3.7
  Remove developer documentation about not describing symbols
  Incorporate Gitaly's Commits#between RPC
  Adapt to new Gitaly commit message format
  Remove transitions on nav link hover
  Provide option to trigger build only for official CE and EE repos in .com
  Fix queries duration sorting in Performance Bar
  Rename Project nav items
  Add structured logging for Rails processes
  Disable Rails logging in CI test environments
  Fix download artifacts button alignment
  Update avatar border to be opaque for better stacking
  Fixed typos
  Fix typos
  Fix external issue trackers redirect
  ...

Conflicts:
	db/schema.rb

This addreses a review remarks discussed in
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/12785/diffs#note_35276344

Add Russian Translations To I18N

Closes #34881

See merge request !12743

Resolve "Clarify k8s service keys"

Closes #33741

See merge request !12188

Add Portuguese Brazil translations of Commits Page & Pipeline Charts

Closes #34173

See merge request !12408

Add Japanese Translation to i18n

Closes #34789

See merge request !12693

Fix external issue trackers redirect

Closes #35132

See merge request !12923

Free `system` namespace by moving uploads into `uploads/-`

Closes #33550

See merge request !12917

Update Prometheus gem to version that explicitly calls `munmap`

See merge request !12955

Remove developer documentation about not describing symbols

See merge request !12953

Provide option to trigger package build only for official CE and EE repos in .com

See merge request !12949

Bump peek-performance_bar to 1.3.0 and get rid of a monkey-patch

See merge request !12939

Gitaly commits between

Closes gitaly#350

See merge request !12669

Add structured logging for Rails processes

See merge request !12928

Rename Project nav items

Closes #34764

See merge request !12921

Remove transitions on nav link hover

Closes #35210

See merge request !12950

Fix download artifacts button alignment

Closes #35137

See merge request !12942

Simplify width for dropdown-menu on mobile

Closes #34468 and #35226

See merge request !12528

[ci skip]

Update avatar border to be opaque for better stacking -- EE backport

Closes #32561

See merge request !12940

This is now covered by rubocop-rspec.

35087 Fix alignment of controls in mr issuable list

Closes #35087

See merge request !12890

Disable Rails logging in CI test environments

See merge request !12847

Fix queries duration sorting in Performance Bar

Closes #35252

See merge request !12947

Update Prometheus documentation for 9.4

Closes #35129

See merge request !12885

Update Prometheus admin documentation for 9.4 - docs

Closes #35175

See merge request !12903

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

This introduces JSON logging for Rails views saved to a file called
`development_json.log`, `production_json.log`, etc.

For example, instead of this unparsable log:

```
Started GET "/" for 127.0.0.1 at 2012-03-10 14:28:14 +0100
Processing by HomeController#index as HTML
  Rendered text template within layouts/application (0.0ms)
  Rendered layouts/_assets.html.erb (2.0ms)
  Rendered layouts/_top.html.erb (2.6ms)
  Rendered layouts/_about.html.erb (0.3ms)
  Rendered layouts/_google_analytics.html.erb (0.4ms)
Completed 200 OK in 79ms (Views: 78.8ms | ActiveRecord: 0.0ms)
```

We get a single line with this:

```
{"method":"GET","path":"/,"format":"html","controller":"HomeController","action":"index","status":200,"duration":79,"view":78.8,"db":0.0,"location":"http://localhost/","time":"2017-07-18 09:35:17 -0700"}
```

Part of #20060