Make BR state enum picklable
Make BR state enum picklable

otherwise db log pickling fails

ThiefMaster/indico,mvidalgarcia/indico,OmeGak/indico,DirkHoffmann/indico,DirkHoffmann/indico,ThiefMaster/indico,mvidalgarcia/indico,indico/indico,pferreir/indico,mic4ael/indico,ThiefMaster/indico,OmeGak/indico,OmeGak/indico,indico/indico,mvidalgarcia/indico,pferreir/indico,mic4ael/indico,indico/indico,indico/indico,mic4ael/indico,DirkHoffmann/indico,ThiefMaster/indico,mic4ael/indico,DirkHoffmann/indico,pferreir/indico,mvidalgarcia/indico,pferreir/indico,OmeGak/indico