Fix failing Capybara test for file attachment
Fix failing Capybara test for file attachment

Tutorial called for first argument in test to be 'image' but per a Treehouse tutorial class or id needs to be specificed as Rails will nest it, i.e. 'post' object and image becomes 'post_image.' Otherwise, error is 'file field not found.'

aklap/PhotoClub,aklap/PhotoClub,aklap/PhotoClub