Add a default printer type to the config.
Move friendly printer name stuff to config
Add printer list filtering based on pipeline config
Merge pull request #212 from seandunn/printer_list_filtering

Printer list filtering
Add default printers to rack scan
- RackScan is inconsistent with the step presenter here
Merge pull request #213 from seandunn/add_rack_default_printers

Add default printers to rack scan