remove un-needed error output from dev-helper
remove un-needed error output from dev-helper

added test to prevent looping over direcories that don't exist

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