DSpace Removal
First step to remove dspace.
Migration Guide:

1) Before integrate this please move all file local contents to dspace.
2) It is necessary to create a DSpaceFileStorage instance (see FenixInitializer.initializeDSpaceFileStorage())
3) Run the SQL in updates.sql
Remove unused dspace save invocations.
Refactor file download code to be used in Fetcher.
Remove references to dspace. Mantain references to searchFiles due to publications' features.
Add generic cron scripts