Open Issue 30: organization affiliation types

[lukeaduncan]

Currently there is one code in mCSD Organization Affiliation Types. Should there be at least two, one for transparent federation vs opaque federation?
The expectations would be different: with transparent federation, federated identifiers would be
preserved in responses and respected in requests. With opaque federation, identifiers would be
consolidated/overwritten with the identifiers of the "parent" organization.

Probably, but the implications of opaque federation are complex. Some aspects may be consolidated
(e.g. golden patient record) while others are not (separate documents). Perhaps we could limit scope
to whether federated communities (Organizations with an ID of type HCID) are addressable in
requests and responses. Seeking input from reviewers.

[lukeaduncan]

Further discussion in #4