Fix README when Run the Rspec
Created by: azusa
gitlab:test task set RAILS_ENV to test in spinach, but spec task dosen't do it. So, when executing "rake spec", we should set RAILS_ENV to test.
Created by: azusa
gitlab:test task set RAILS_ENV to test in spinach, but spec task dosen't do it. So, when executing "rake spec", we should set RAILS_ENV to test.