Put REST API compatibility tests under CI with Jenkins X

Let's:

• Create a Jenkins X team in the new Kubernetes cluster: "fit"? "platform"? ...
• Create a Node.js builder.
• Create a pipeline from https://github.com/nuxeo/rest-api-compatibility-tests to run at least yarn test against a Nuxeo Platform in 10.10-HFXX and/or master?

What was done:

• Created the Jenkins X "platform" team accessible at http://jenkins.platform.34.74.59.50.nip.io.
• Installed/configured the following plugins:
  • GitHub for PR build statuses.
  • JIRA for issue updates.
  • Embeddable Build Status for the build status badge.
• Configured the branch patterns triggering the multibranch pipeline jobs:

  master|PR-.*|feature-.*|task-.*|fix-.*|wip-.*
  

• Imported these GitHub repositories, which created a multibranch pipeline job for each one of them:
  • https://github.com/nuxeo/nuxeo-helm-charts (required for the second one)
  • https://github.com/nuxeo/rest-api-compatibility-tests
• Didn't create a specific builder (aka agent), relying on the default jenkins-nodejs is enough for now (node: v11.14.0, yarn: v1.3.2).
• Running the REST API compatibility tests against the nuxeo/nuxeo:master Docker image configured with PostgreSQL and Elasticsearch, installed with the nuxeo Helm chart, archiving the server.log artifact. See http://jenkins.platform.34.74.59.50.nip.io/job/nuxeo/job/rest-api-compatibility-tests/.