Transition first Workflow component to Jenkins Pipeline

[Cryptophobia]

From @vdice on June 23, 2016 20:29

Part of Meta ticket https://github.com/deis/jenkins-jobs/issues/117 Estimated size: [M]

Take one Workflow component repo and convert to using Jenkins Pipeline/Jenkinsfile

• Replicating component pipeline as exists now: image build/push job -> e2e job
• See component_jobs.groovy and workflow_test.groovy
• Should include getting rid of Travis and replacing w/ a correlating stage in Jenkinsfile
• Questions needing answers:
  • How are forked PRs (read: most PRs) handled? Based on current reading, it doesn't appear that only branches on origin are tested.
  • How are slack notifications handled? Can we finally fine-tune Slack channels depending on repo?

Copied from original issue: deis/jenkins-jobs#118