Refactor document views specs

https://www.pivotaltracker.com/story/show/73291456
Summary of changes: https://docs.google.com/document/d/13TNmNkD6__d-7TbnvkNUV8yvCY8bc_SGa6ewxewrciE/edit?usp=sharing
When you create a stubbed object, methods get stubbed out.  Bryan's main concern is that if you the change the model and, say, remove some of the methods, the specs would still pass even though those methods do not exist any more.  Rspec 3 verifying doubles take care of that.  What about this build_stubbed?