rename copiedArchives to copiedFiles

 - they are including the sha1 files so the old name was misleading

Change-Id: I6156b5590bc98ed319a093c82be32d9f79699d28
Reviewed-by: Niels Weber <niels.weber@digia.com>
Reviewed-by: Karsten Heimrich <karsten.heimrich@digia.com>