This commit removes the
fix_related_environments_for_merge_requests feature flag.

Changelog: other

This commit is a follow-up of fixing related environments
for merge requests. It effectively narrows down the scope of
stopping environments to be in MR pipelines.

This commit fixes the regression that unrelated environments
are teardown when a MR has been merged/closed.

This fix is still behind the feature flag.

This commit fixes the regression that the environments
are stopped incorrectly in merge requests.

This fix is still behind the feature flag.

This pipeline.environments association creates cross-db queries, so
should be removed eventually

This commit refactors the code not to use CTE joins
between deployments/environments and ci_builds/pipelines.

This commit refactors the inconsistent namespace of the environments
stop service, and fixes its bug that the service can't stop
empty environment.

Changelog: fixed

The plan for RSpec 4.0 is to disable monkey patching, reference:
https://rspec.info/blog/2013/07/the-plan-for-rspec-3/#zero-monkey-patching-mode
https://relishapp.com/rspec/rspec-core/docs/configuration/zero-monkey-patching-mode

This commit stops using RSpec monkey patching in several specs.

The correct use is Gitlab::ErrorTracking.track_exception

This commit fixes the flaky spec failure

This commit adds environment auto stop worker

This commit reduces the lock contention of internal iid

Due to the nature of pipelines for merge requests, deployments.ref can
be a merge request ref instead of a branch name.

We support the environment auto-stop hook for this case

Probably useful as we often move these files to "new" files.

Remove superfluous lib: true, type: redis, service: true, models: true, services: true, no_db: true, api: true

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

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

This reverts commit e00fb2bdc2090e9cabeb1eb35a2672a882cc96e9.

# Conflicts:
#	.rubocop.yml
#	.rubocop_todo.yml
#	lib/gitlab/ci/config/entry/global.rb
#	lib/gitlab/ci/config/entry/jobs.rb
#	spec/lib/gitlab/ci/config/entry/factory_spec.rb
#	spec/lib/gitlab/ci/config/entry/global_spec.rb
#	spec/lib/gitlab/ci/config/entry/job_spec.rb
#	spec/lib/gitlab/ci/status/build/factory_spec.rb
#	spec/lib/gitlab/incoming_email_spec.rb

This reverts commit cb10b725c8929b8b4460f89c9d96c773af39ba6b.

This reverts commit e00fb2bdc2090e9cabeb1eb35a2672a882cc96e9.

# Conflicts:
#	.rubocop.yml
#	.rubocop_todo.yml
#	lib/gitlab/ci/config/entry/global.rb
#	lib/gitlab/ci/config/entry/jobs.rb
#	spec/lib/gitlab/ci/config/entry/factory_spec.rb
#	spec/lib/gitlab/ci/config/entry/global_spec.rb
#	spec/lib/gitlab/ci/config/entry/job_spec.rb
#	spec/lib/gitlab/ci/status/build/factory_spec.rb
#	spec/lib/gitlab/incoming_email_spec.rb

This reverts commit cb10b725c8929b8b4460f89c9d96c773af39ba6b.