Fix bug when deleting empty group

Delete functionality - phase 1 (tagging)

Delete requires admin, refactor containerutil.get_analyses(), add test for unreferenced file deletion

Remove direct access of potentially missing keys in job enqueue 

Fix missing projection in get_all

Create list of formalized top-level info keys that will always be returned

Mark failed job output

Fix missing origin on download

Added automated testing of JSON Schemas using examples.

Added automatic unit tests for validation of example json files against existing schemas, and fixed failing tests.