Add a mechanism for specifying the ORCID for a user requesting file transfers.

[jeff-cohere]

Right now we assume that the ORCID associated with a dev token is the same as that for a user requesting a file transfer. We should add an ORCID field to a transfer request and use that one instead to identify the requestor.

[jeff-cohere]

When we generate a DTS manifest as part of a transfer task, we include information about the requesting user in the corresponding DataPackage Contributors field. If we are handed an ORCID, we could retrieve this information using the ORCID Public API.

[jeff-cohere]

For mapping an ORCID to a KBase user, we might be able to use this service:

https://github.com/kbase/kbase-service-orcidlink