Basic underpinnings for bulk upload via rake task run with a mounted …

Created by: tingtingjh

…share containing files to be uploaded.

Refactor batch_upload and complete the batch update files task

Finish LIBTD-1110: Batch Upload/Update FileSet; due to the asynchronous nature of the ingest pipeline, cleaning up tmp files is handled by running a cron job.

Should not delete tmp files in background job that spawns other asynchronous processes