Cloned from launchpad blueprint https://blueprints.launchpad.net/sahara/+spec/edp-test-job-manager-refactor. Description: The job manager has been refactored to support multiple EDP engines (the newest of which is the Spark engine) The job manager unit tests should be refactored as follows * subdirectory for each EDP engine type (spark subdir added as part of the Spark EDP change request) * job manager common utils at the top level This essentially involves moving the unit tests for the Oozie implementation into a subdirectory, extracting Oozie-specific tests from the current test_job_manager.py and leaving only tests common to all engines at the top level (spec in progress) Specification URL (additional information): None