Fix plugin context handling in celery tasks
Fix plugin context handling in celery tasks

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