add: [stix export] Process objects export now supports port attributes
add: [stix export] Process objects export now supports port attributes

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