Merge branch 'build-finished-worker-spec-prepend' into 'master'

Remove use of any_instance_of in runner spec

See merge request gitlab-org/gitlab-ce!17427

spec/requests/api/runner_spec.rb

@@ -700,7 +700,7 @@ describe API::Runner do
 
       context 'when tace is given' do
         it 'creates a trace artifact' do
-          allow_any_instance_of(BuildFinishedWorker).to receive(:perform).with(job.id) do
+          allow(BuildFinishedWorker).to receive(:perform_async).with(job.id) do
             CreateTraceArtifactWorker.new.perform(job.id)
           end