cubicweb-medicalexp #3489144 Patient surname/firstname [validation pending]

These attributes are not required but are sometimes usefull to keep.

prioritynormal
typebug
done in0.8.0
load0.100
load left0.000
closed by#c06bb180f338 [schema] Add patient surname/firstname, closes #3489144
patch[schema] Add patient surname/firstname, closes #3489144 [applied]