Refactoring projects/views for RSpec v3 syntax

Refactor the rspec syntax for the projects/views and taking care of any deprecation warnings
PT story: https://www.pivotaltracker.com/story/show/76507548

you mean that "let(:projects_collection) do" line? 

I tried but couldn't refactor it with build_list(:project, 9, user: user). It throws a strange error in the view that I couldn't investigate on.