* master: (119 commits)
  [ci skip] Fix example commands to refer to the correct versions
  Use axios instead of jquery ajax for setCiStatusFavicon
  refactor groups controller to match EE
  Fix broken test
  Introduce a new QA::Gitlab::Page::Component::Dropzone class
  Gitaly Server info for admin panel
  Add note about being in the `qa` directory for `bin/qa` to work
  Remove N+1 queries with /projects/:project_id/{access_requests,members} API endpoints
  Fix not all events being shown in group dashboard
  Add support for PreReceiveError in UserMergeBranch RPC
  Migrate Git::Repository#delete_refs to Gitaly
  Replace $.get in render math with axios
  Move mr widget related links into a vue file
  Make those files as close as EE to reduce conflicts
  Don't assume postgresql in two initializers
  Move Repository#can_be_merged? to Gitlab::Git::Repository
  Remove brakeman from .codeclimate.yml since it's now covered by the sast CI job
  Update Nokogiri to 1.8.2
  Ignore conflicts in db/schema.rb in Gitlab::EeCompatCheck
  Remove Rugged exception in cache rescue
  ...

Merge branch '4761-follow-up-from-resolve-developers-should-be-able-to-create-new-projects-in-group' into 'master'

Refactor groups controller to match EE

Closes gitlab-ee#4761

See merge request gitlab-org/gitlab-ce!16832

[ci skip] Fix example commands to refer to the correct versions

See merge request gitlab-org/gitlab-ce!16683

Move mr widget related links into a vue file

See merge request gitlab-org/gitlab-ce!16825

Replace $.get in render math with axios

See merge request gitlab-org/gitlab-ce!16697

Use axios instead of jquery ajax for setCiStatusFavicon

See merge request gitlab-org/gitlab-ce!16784

Stop rescuing Rugged::Reference in Repository cache

See merge request gitlab-org/gitlab-ce!16770

Remove N+1 queries with /projects/:project_id/{access_requests,members} API endpoints

See merge request gitlab-org/gitlab-ce!16751

Gitaly Server info for admin panel

See merge request gitlab-org/gitlab-ce!16794

Introduce a new QA::Gitlab::Page::Component::Dropzone class

See merge request gitlab-org/gitlab-ce!16805

Move Repository#can_be_merged? to Gitlab::Git::Repository

Closes #42544

See merge request gitlab-org/gitlab-ce!16771

Fix not all events being shown in group dashboard

Closes #42560

See merge request gitlab-org/gitlab-ce!16819

Remove brakeman from .codeclimate.yml since it's now covered by the sast CI job

See merge request gitlab-org/gitlab-ce!16808

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

Resolve "mysql-only installation from source broken: Gem::LoadError: pg is not part of the bundle"

Closes #42239

See merge request gitlab-org/gitlab-ce!16810

Unify and split CE/EE for spec/requests/api/jobs_spec.rb

See merge request gitlab-org/gitlab-ce!16804

Add note about needing to be in the `$gdk/gitlab/qa` directory for `bin/qa` to work properly

See merge request gitlab-org/gitlab-ce!16824

[ci skip]

Converted $.ajax calls in some JS files to axios

See merge request gitlab-org/gitlab-ce!16717

Document format parameter for Repository Archive endpoint

Closes #42499

See merge request gitlab-org/gitlab-ce!16766

Implements the client side for gitlab-org/gitaly#819. Which is a server
info command. This checks the server version and git binairy version on
the server.

A small UI was added for administrators, so they can check the status of
the Gitaly server. This is done for each storage the monolith knows.

Because of this commit, gitlab-org/gitlab-ce!15580 is now closed. That
MR removed the Git version too, but didn't replace it with anything.

I ran into some issues when trying it out
https://gitlab.slack.com/archives/C3JJET4Q6/p1517384135000134

We can simplify the code quite a bit and improve performance by using
grape-entity merge fields:

https://github.com/ruby-grape/grape-entity/tree/v0.6.0#merge-fields

Relates to #42030

The group activity feed was limited to the first 20 projects found
in the group, which caused activity from some projects to be omitted.
A limit of 20 is applied to the query for events, so the
extra pagination does little in the way of performance.

Closes #42560

Add support for PreReceiveError in UserMergeBranch RPC

Closes gitaly#979

See merge request gitlab-org/gitlab-ce!16765

Migrate Git::Repository#delete_refs to Gitaly

Closes gitaly#967

See merge request gitlab-org/gitlab-ce!16723

Closes gitaly#979

Closes gitaly#967

Reduce the cardinality of GitLab metrics

Closes #41771

See merge request gitlab-org/gitlab-ce!16443