Tidy the 'provenance' fields in the AFT and ATU

[j-hagedorn]

Clean to consistently reference nations or people groups in a consistent format

[j-hagedorn]

@sdaranyi and @salmonix , this would be moderately complex effort, but I'm wondering your thoughts about its value. Is this worth pursuing, compared to the other high priority efforts we're considering prior to the Riga conference?