Port of 23986-choose-commit-email to EE

See merge request gitlab-org/gitlab-ee!7286

Feature: State filter for admin runners view (EE-port)

See merge request gitlab-org/gitlab-ee!6948

Remove unused packages config from 1_settings.rb

See merge request gitlab-org/gitlab-ee!7362

CE upstream - 2018-09-14 05:22 UTC

See merge request gitlab-org/gitlab-ee!7369

CE upstream - 2018-09-13 18:21 UTC

Closes gitlab-ce#51370

See merge request gitlab-org/gitlab-ee!7366

Enable frozen string in app/graphql + app/finders

See merge request gitlab-org/gitlab-ce!21681

Update Gitlay server version to 0.121.0

See merge request gitlab-org/gitlab-ce!21725

Resolve "ee:geo QA specs are failing as of !7210"

Closes gitlab-org/quality/nightly#7 and #7434

See merge request gitlab-org/gitlab-ee!7315

# Conflicts:
#	app/controllers/passwords_controller.rb
#	app/finders/users_finder.rb
#	app/models/hooks/service_hook.rb
#	app/models/issue.rb
#	app/models/note.rb
#	app/models/user.rb
#	app/services/applications/create_service.rb
#	app/services/milestones/update_service.rb
#	app/services/search/group_service.rb
#	lib/api/helpers.rb
#	lib/api/resource_label_events.rb
#	lib/gitlab/group_hierarchy.rb

[ci skip]

Fixed resolved discussions not toggling expanded on changes tab

Closes #51370

See merge request gitlab-org/gitlab-ce!21676

As a side benefit, we don’t need to resolve the race condition in which
the secondary node does not yet have a GeoNodeStatus when the specs make
requests for it.

Test that alert's environment is verified

See merge request gitlab-org/gitlab-ee!7360

Fix column differences in `db/schema.rb`

See merge request gitlab-org/gitlab-ce!21718

Check that creating an alert for an project non-specific environment
is not possible and return 204.

Add project to jupyter cluster app factory spec

See merge request gitlab-org/gitlab-ce!21717

CE upstream - 2018-09-13 12:21 UTC

Closes gitlab-ce#49621, gitlab-ce#50186, and charts/auto-deploy-app#6

See merge request gitlab-org/gitlab-ee!7359

Document abstraction levels and code reuse

See merge request gitlab-org/gitlab-ce!21254

Remove unused Geo nodes routes

See merge request gitlab-org/gitlab-ee!7352

This is based on the discussion in
https://gitlab.com/gitlab-org/gitlab-ce/issues/49653 and the example
merge request found at
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/20908. The idea
is fairly straightforward: we define a variety of abstractions, then
state which can reuse which. This should ultimately foster _better_ code
reuse, make it easier to debug problems, and make it harder to
accidentally introduce a performance regression.

Add RuboCop cops to enforce code reusing rules

See merge request gitlab-org/gitlab-ce!21391

EE: Add RuboCop cops to enforce code reusing rules

See merge request gitlab-org/gitlab-ee!7229