Add support for validating infores keys

[edeutsch]

TRAPI refers to infores keys for provenance. There is a spreadsheet of infores keys somewhere. It would be great to ensure that the infores keys listed in a TRAPI document are valid.

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[edeutsch]

oops, collision with #29

[RichardBruskiewich]

Way ahead of you @edeutsch, LOL. I was listening during today's architecture committee call.

[edeutsch]

thank you!