fix: [stix import] Improved uuid fetching
fix: [stix import] Improved uuid fetching

Rafiot/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,FloatingGhost/MISP,SteveClement/MISP,devnull-/MISP,devnull-/MISP,MISP/MISP,devnull-/MISP,MISP/MISP,FIRSTdotorg/MISP,MISP/MISP,MISP/MISP,FIRSTdotorg/MISP,SteveClement/MISP,SteveClement/MISP,Rafiot/MISP,Rafiot/MISP,FIRSTdotorg/MISP,FloatingGhost/MISP,FIRSTdotorg/MISP,devnull-/MISP,FloatingGhost/MISP,FloatingGhost/MISP,Rafiot/MISP