Use ClustersController as base while having Projects::ClustersController
to inform what `clusterable` is. Thanks @ayufan for the great suggestion
!

- View changes to work with new approach

- Fix javascript for new approach

- Fix feature specs for new approach

- Fix QA

When we unhooked ClustersController from
Project::ApplicationsController, we missed an EE override to
handle_not_found_or_authorized.

Rather than carry on with override RoutingActions, make a specific proc
for Project that we override in EE instead. Use that proc in both
Clusters::BaseController and Project::ApplicationsController.

Restore app/helpers/clusters_helper.rb to CE, move override to EE
module.

- Move show path for cluster to ClusterPresenter

- Create ClusterablePresenter to encapsulate logic. Consolidates
scattered methods from BaseController and ClustersHelper into an object.

- EE: Restore metrics json endpoint for cluster

Use new controller so that we have one less EE prepend.

- EE: Fix assets and views for ClustersController

We moved from Projects::ClustersController to ClustersController.
So, some of the EE only views and assets needs to be updated.

Also update some EE only controller specs to ClustersController

- EE: Update override of can_create_cluster?

The method signature changed in CE to accomodate group as a
`clusterable`. Correspondingly, update the method to use `clusterable`.

This presumes multiple group level clusters is available at the same
license as projet level clusters which is GitLab Premium.

Also fix related specs

To the extent possible swap out `project` with `clusterable`

- Abstract paths for showing cluster or clusters. This will allow us to
swap in alternative paths for group level cluster

- Push :project_id and :namespace_id params from the URL to the POST
body.

- Create a nice helper for to generate links for the destroy
action

For some reason, spec :project_id and :namespace_id param are not going
through `to_param` for a JSON format. Manually call `to_param` to fix
specs.

- Move :layout to BaseController

In preparation so that we can create both cluster attached to project
and cluster attached to group.

- Move ClustersController to top level

- Move Clusters::ApplicationsController to top-level too

- Creates a Clusters::BaseController to share common functions

- Do not rely on @project ivar. Anything could set the ivar.

- Fix Vue page components due to new data-page value

Because of the controller change we have gone from
`projects:clusters:new` to `clusters:new`, so we need to update the file
location of the page components. There is somewhere a function that will
convert data-page to a file location.

On that note, projects/clusters/gcp/new/, translate to
Projects::Clusters::Gcp#new doesn't exist so replace that with
clusters/create_gcp/ and clusters/create_user/

Renaming Secret Variables in the codebase (EE Port)

See merge request gitlab-org/gitlab-ee!7964

Absorb product into factory

Closes gitlab-ce#52992

See merge request gitlab-org/gitlab-ee!8100

(EE-Port) Add language param to highlight

See merge request gitlab-org/gitlab-ee!7276

Prettify all the things (EE)

See merge request gitlab-org/gitlab-ee!8114

CE upstream - 2018-10-30 04:22 UTC

See merge request gitlab-org/gitlab-ee!8139

Fix Pod Log topbar position when perf bar is disabled

Closes #7203

See merge request gitlab-org/gitlab-ee!7853

Merge branch '7433-mirroring-repos-direction-select-empty-and-consistency-across-offerings' into 'master'

Remove unneeded can_pull and can_push checks for ee mirror_repos_form

Closes #7433

See merge request gitlab-org/gitlab-ee!8077

[CI] Add missing new lines

Closes #8191

See merge request gitlab-org/gitlab-ee!8141

Otherwise jasmine/new-line-before-expect is failing

# Conflicts:
#	app/controllers/projects/issues_controller.rb
#	locale/gitlab.pot
#	spec/javascripts/vue_shared/components/sidebar/collapsed_grouped_date_picker_spec.js

[ci skip]

Fix problem with spec that showed up in EE merge

See merge request gitlab-org/gitlab-ce!22675

CE upstream - 2018-10-29 11:21 UTC

Closes #7760

See merge request gitlab-org/gitlab-ee!8131

This gives flexiblity to avoid duplicated query of Project.

Extract language_from_git_attributes as a concern so it can
ben included in two blob classes.

This is to DRY the repeated file size check.

Move spec and constants to Highlight

This replaces the repository param.
This allows more flexiblity as sometimes we have highlight content
not related to repository. Sometimes we know ahead of time the language
of the content. Lastly language determination seems better fit as a
logic in the Blob class.
`repository` param is only used to determine the language, which seems
to be the responsiblity of Blob.

Force FoundBlob to use BlobPresenter

Ported from Highlight class since it as a concept is more related to
blob, and this allows more flexibility.

seed_helper changed because testing requires attributes file in repo,
but repo was not a real git repo but instead faked.

Don't synchronize default branch for pull mirrors

Closes #8108

See merge request gitlab-org/gitlab-ee!8138

docs: Add deprecation notice for renamed licensed feature

See merge request gitlab-org/gitlab-ce!22575

docs: Add deprecation notice for renamed licensed feature

See merge request gitlab-org/gitlab-ee!8064

Geo: Stale docs on frequency of Geo replication

Closes #7858

See merge request gitlab-org/gitlab-ee!8061