fix: [stix restSearch] Fixed output json format in case of empty results
fix: [stix restSearch] Fixed output json format in case of empty results

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