Simplify Author model testing
Simplify Author model testing

The only purpose of testing the models is to make sure that we can
use the expected keyword arguments during object creation. For this
purpose, full CRUD testing is not necessary. Testing object creation
is enough.

petertrotman/adventurelookup,petertrotman/adventurelookup,petertrotman/adventurelookup,petertrotman/adventurelookup