Update bagit profiles to work with UAL preservation workflow

[zoidy]

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Description

The way bagit profiles are handled for use in bagging via dart runner needs to be updated in order to better integrate with UAL's larger preservation workflow. Broadly speaking, we will move away from having profiles that are compliant with the official Bagit Profile Spec and instead use profiles that are in the DART format (which apart from having a slightly different format, are generally a superset of the official profile spec)

Suggested Implementation

• Move profile folder
• Create a profile and corresponding storage settings in DART that matches the existing redata-bagit-dart-v2.2.json. Export this as json using the DART "Export Settings" function.
• Add External-Identifier as a required tag to bag-info.txt
• Save this file as redata-bagit-dart-v3.0.json and eliminate redata-bagit-dart-v2.2.json
• Ensure that the profile version in the file is set to 3.0 and also update BagIt-Profile-Identifier
• Update workflow file manually
• Update bagger to set the External-Identifier tag in bag-info.txt using the format {id of item on figshare}-{version}-{first author firstname}-{first author lastname}-{hash}