DNA Field Fix

Resolves #5829. b_dna vets against the datacore definition of the medical record and the "dna" that was there does not. Moreover, b_dna is a medical record, not a general record as it suggested.

Reviewing this has opened up a few questions for me including medical/security data validation on the new Computer3 systems. I'll post a different pull for that since I'm not sure where we are with the Computer3 systems and there's no need to interfere with this bug fix while I find out.