add: [stix2 import] Added AS in the list of parsed attributes
add: [stix2 import] Added AS in the list of parsed attributes

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