Changed dev-helper to pull sampledata from Git instead of SVN.
Changed dev-helper to pull sampledata from Git instead of SVN.

artefactual/archivematica,sevein/archivematica,michal-ruzicka/archivematica,sevein/archivematica,eckardm/archivematica,artefactual/archivematica,sevein/archivematica,michal-ruzicka/archivematica,artefactual/archivematica,eckardm/archivematica,michal-ruzicka/archivematica,sevein/archivematica,artefactual/archivematica,eckardm/archivematica,michal-ruzicka/archivematica,eckardm/archivematica