Merge branch 'generic-alertsettings-befe' into 'master'

.rubocop.yml

ee/app/models/ee/project.rb

ee/app/models/ee/service.rb

ee/app/models/project_services/alerts_service.rb

ee/app/models/project_services/alerts_service_data.rb

ee/app/views/projects/services/alerts/_help.html.haml

ee/changelogs/unreleased/generic-alertsettings-befe.yml

ee/lib/ee/api/helpers/services_helpers.rb

.../features/projects/services/user_activates_alerts_spec.rb

ee/spec/models/project_services/alerts_service_spec.rb

ee/spec/models/project_spec.rb

ee/spec/models/service_spec.rb

lib/api/helpers/services_helpers.rb

locale/gitlab.pot

spec/lib/gitlab/import_export/all_models.yml

spec/support/shared_contexts/services_shared_context.rb