For persistor projections, handle default case (no primitives wanted in projection)

[sshankar19]

in persistor new api tests there is

 projection: { Address: ['city'], Role: ['name'], Phone ['']}}).then(function(employee) {
            expect(employee.homeAddress.state).is.equal(undefined);

revisit this for fetching all persistor related properties, foreign keys but not primitives. Maybe should be Phone: null or Phone: []