Space: Move path mangling to Space
Space: Move path mangling to Space

move_to_storage_service expects the source path to be absolute, and the
destination path to be absolute inside the staging path. Since this is
common, move it to Space.

artefactual/archivematica-storage-service,artefactual/archivematica-storage-service,artefactual/archivematica-storage-service,artefactual/archivematica-storage-service