Allow running a single spec file

Due to missing requires the only way to execute unit tests is by doing
`bundle exec rake`.

Author: sauloperez

spec/spec_helper.rb

@@ -6,6 +6,10 @@
 require 'rspec/rails'
 require 'rspec/autorun'
 require 'capybara/rails'
+require 'database_cleaner'
+require 'fabrication'
+require 'faker'
+I18n.reload!
 
 # Requires supporting ruby files with custom matchers and macros, etc,
 # in spec/support/ and its subdirectories.