RSpec models test refactoring
Refactor a request test for posts, add login to User factory and model tests
Remove request tests for posts and use controller test for it
Comments controller RSpec
Sessions controller RSpec
Users controller RSpec
Capybara / Selenium gems
Merge branch 'feature/js-ruby-tests' into develop

* feature/js-ruby-tests:
  Capybara / Selenium gems
  Users controller RSpec
  Sessions controller RSpec
  Comments controller RSpec
  Remove request tests for posts and use controller test for it
  Refactor a request test for posts, add login to User factory and model tests
  RSpec models test refactoring