* run test workloads for a Docker cluster
* better manage docker image versions
* Changes to make multinode docker tests work with Python 3.
* option to mount local test directory on head node to speed development
* Attempt to simplify multinode test setup.
* Small change.
* Add in development-mode to run multinode docker tests more easily during development.
* add jenkins test script that links to Docker hash
* Read docker SHA from build_docker.sh and add test that should fail.
* Consolidate implementations and remove duplicate files.
* Allow test to retry if it fails to schedule on all nodes.
* Remove sleep when in docker multinode tests.
