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
possibly, but as far as I know, RSpec 3 does not complain if we explicitly opt-in to automatic inference. It depends on how you prefer to structure your tests, but at the moment, our tests are following conventions so there is no need for us to go through the extra effort to change it if it isn't necessary.