Reverse ref and sha in args and rename pipeline to pipeline_for

app/models/merge_request.rb

app/models/project.rb

app/views/projects/issues/_related_branches.html.haml

db/fixtures/development/14_builds.rb

lib/api/commit_statuses.rb

spec/models/project_spec.rb

spec/requests/api/commits_spec.rb

spec/services/ci/image_for_build_service_spec.rb