#78173648 get signature and datafile by index, test updated
#78173648 get signature and datafile by index, test updated

keijokapp/digidoc4j,open-eid/digidoc4j,antonioaraujob/digidoc4j,keijokapp/digidoc4j,fazz/digidoc4j,open-eid/digidoc4j,fazz/digidoc4j,antonioaraujob/digidoc4j,open-eid/digidoc4j