fix: [stix1 import] Fixed email object import
fix: [stix1 import] Fixed email object import

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