added id obfuscation for download filename of private jobs
added id obfuscation for download filename of private jobs

paczian/MG-RAST,paczian/MG-RAST,teharrison/MG-RAST,teharrison/MG-RAST,MG-RAST/MG-RAST,teharrison/MG-RAST,MG-RAST/MG-RAST,MG-RAST/MG-RAST,teharrison/MG-RAST,paczian/MG-RAST,teharrison/MG-RAST,paczian/MG-RAST,teharrison/MG-RAST,MG-RAST/MG-RAST,paczian/MG-RAST,MG-RAST/MG-RAST,paczian/MG-RAST