File Upload Consistency

[johnbradley]

Due to the DukeDS eventual consistency changes files that are uploaded will have three states after a ddsclient upload command finishes.

• Uploading - file chunks have been uploaded, waiting for them to be stitched together in swift and indexed in DukeDS
• Complete - file is fully uploaded
• Error - An error occurred in combining the chunks/indexing and the file invalid
  DukeDS will be adding an API endpoint to check the status of a project.

DukeDSClient changes

• Allow a user to wait for a project to be come consistent as part of uploading. This would make it safe to script deleting the files being uploaded (current pre-eventual consistency behavior).
• Allow a user to check the status of a project