add: [stix2 export] Exporting process image attribute in observable objects
add: [stix2 export] Exporting process image attribute in observable objects

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