refactor `spec_helper` for readability/do less arbitrary work
refactor `spec_helper` for readability/do less arbitrary work

move some behavior driven by rspec metadata to `before(:example, :tag)` style
blocks, instead of checking the example tags manually.

squash some repository cleaning stuff into a method.

remove a line that just says "Remove this line". :|

samvera/hyrax,samvera/hyrax,samvera/hyrax,samvera/hyrax