SW-699: adapted ingest to new messaging framework using a central broker with a central exchange and proper routing_keys/queues

SW-699: Use exchange,routing_key syntax for AbstractBusListener constructor, drop use of **kwargs, fix IngestEventHandler as it was still propagating subjects to listen for

SW-699: Make notifications unconfigurable, greatly reducing complexity of the higher abstraction layers.

SW-699: Use a single broker and bus (exchange), and make service names unconfigurable (fixed in Service and RPC). Greatly reduces configuration size.

SW-657: locking. logging. added test to reconnect to frombus if not receiving new jobs when the jobmanager says there are jobs to do

SW-657: simple priority sorting for new python3 changes, simplified canProduceNextJob method to simple lookup of a single scheduled job