Conflicts:
	spec/models/ci/pipeline_spec.rb

This is a first step to decouple pipeline from YAML processing. It
reduces the coupling by removing some methods that introduce coupling
and by moving logic into separate chain element that is being used to
populate pipelines with stages and builds.

Conflicts:
	spec/models/ci/pipeline_spec.rb

Conflicts:
	app/services/ci/create_pipeline_service.rb
	app/services/ci/pipeline_trigger_service.rb

Move email footer info to a single line -- EE merge edition

See merge request gitlab-org/gitlab-ee!5066

Break utils functions for security issues

See merge request gitlab-org/gitlab-ee!5064

[ci skip]

[ci skip]

Geo - Avoid rescheduling the same project again in a backfill condition

See merge request gitlab-org/gitlab-ee!5069

See https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/17916

From
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/5031#note_64372406

CE upstream - 2018-03-21 00:25 UTC

See merge request gitlab-org/gitlab-ee!5054

Add docs for ChatOps

See merge request gitlab-org/gitlab-ee!5033