Create Dockerfile and new Jenkinsfile to mock Travis setup

[mogren-usds]

• Create a Dockerfile to at least mock the test environment to be used with Jenkins/CircleCi/locally/or any other CI pipeline that accepts Docker.
• Create a new Jenkinsfile (separate of the current Jenkinsfile) that sets up a Kubernetes cluster with Postgres, Redis and the Ruby containers to be used for the Jenkins instance Vets.gov has set up
• Set up a Jenkins job (in the new instance) to execute all tests for the Caseflow project

AC

• Running the docker-compose steps in your development environment build the docker container and start an environment
• The DSVA Jenkins test environment pulls the container successfully from the DSVA Docker repo and spawns an environment with k8s
• The Jenkins instance executes all tests with similar stages as the current Travis setup
  • Flakey tests will be addressed in separate tickets

[NickHeiner]

See also: #2293.

/cc @kierachell in case you have also done work with Docker for this.

[NickHeiner]

/cc @shanear

[ghost]

One fix was added at 12:30pm today

I am basically waiting for the Jenkins builder to stabilize:

[ghost]

• Waiting on a Kubernetes patch: https://github.com/jenkinsci/kubernetes-plugin/blob/master/CHANGELOG.md#012
  • mainly because Limit pod name to 63 characters, and shorten randomly generated string jenkinsci/kubernetes-plugin#143
  • Fix workingDir inheritance error jenkinsci/kubernetes-plugin#136
  • and a lot of other fixes
• Waiting for production deployment of the whole builder
  • need to see how many concurrent PRs we can run
  • clean up some of the tests to make stable

[ghost]

sadface