Integrate the results from Browsertrix Cloud

[anjackson]

Following #121, to integrate the results:

• Must define an internal protocol, e.g. a specific tag, to make collection as complete and ready to upload.
• Dedup?
• WACZ and even WARC naming conventions?
• Must be able to upload WACZ to HDFS.
  • https://github.com/ukwa/ukwa-manage/issues/114
• Must be able to index the WACZ file into out OutbackCDX service.
  • See https://github.com/ukwa/ukwa-manage/issues/113
  • Should use the more recent OutbackCDX CDXJ support (including upgrading the index)