chg: [internal] Little optimise Event::getRelatedAttributes
chg: [internal] Little optimise Event::getRelatedAttributes

SteveClement/MISP,MISP/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP,MISP/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP