Don't include duplicates when searching users
Don't include duplicates when searching users

In the case a search is performed including the event persons, return
only the event person and not the user associated to it.

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