OR-638 Add the current user as file creator
OR-638 Add metadata.creator to all files to be saved
Merge pull request #433 in OR/rse from OR/rse-chamerling:OR-638-fileowner to master

* commit '61d612e238ee10946206342ca8d79e2f5185d693':
  OR-638 Add metadata.creator to all files to be saved
  OR-638 Add the current user as file creator