Fill out the dataset collection parameter test and add a new test for a workflow that includes subcollection mapping. Move toward orchestrating jobs in this file via a high-level YAML description of steps and test data as well as some higher-level methods for testing various stuff about extracted workflows (step counts, input types, tools used, connected-ness, etc...).
Allow ordering jobs index API by create_time instead of update_time.
test_workflows.py was pretty unwieldy and the workflow extraction tests were very different than the other tests in that file (e.g. very different helper functions).
John Chilton