Move family object POST/PUT to its own function
Move family object POST/PUT to its own function

This prepares for writing multiple family objects if the user requests multiple copies.

philiptzou/clincoded,philiptzou/clincoded,ClinGen/clincoded,philiptzou/clincoded,ClinGen/clincoded,ClinGen/clincoded,philiptzou/clincoded,ClinGen/clincoded,philiptzou/clincoded,ClinGen/clincoded