switched to Jena TDB store for deposit model

refactored deposit jobs, separating model persistence from tasks
added security checks to deposit update commands and filtered their presentation in JS
added a CDR METS deposit generator for tests
add a separately worked redis queue for memory intensive CDR METS conversion jobs, 1 worker at present
So it is only using the jena TDB model right now, correct?  At one point we talked some about having it alternate between that and the n3 model