delete files from grendel after they are copied to o-drive

Created by: Lars Dalby

Imported comments:

By Lars Dalby on 2018-06-21T16:45:22.799Z

closed via merge request !17

By Lars Dalby on 2018-06-21T16:45:22.625Z

mentioned in commit a6468cb5

By Lars Dalby on 2018-06-21T16:43:44.543Z

mentioned in merge request !17