Remove temp files from form_generator_spec.

I was wondering where these came from...

```
pete@balloon ~/projects/refinerycms $ find core/tmp/vendor/extensions/rspec_form_tests/
core/tmp/vendor/extensions/rspec_form_tests/
core/tmp/vendor/extensions/rspec_form_tests/app
core/tmp/vendor/extensions/rspec_form_tests/app/mailers
core/tmp/vendor/extensions/rspec_form_tests/app/mailers/refinery
core/tmp/vendor/extensions/rspec_form_tests/app/mailers/refinery/rspec_form_tests
core/tmp/vendor/extensions/rspec_form_tests/app/mailers/refinery/rspec_form_tests/mailer.rb
core/tmp/vendor/extensions/rspec_form_tests/app/models
core/tmp/vendor/extensions/rspec_form_tests/app/models/refinery
core/tmp/vendor/extensions/rspec_form_tests/app/models/refinery/rspec_form_tests
core/tmp/vendor/extensions/rspec_form_tests/app/models/refinery/rspec_form_tests/setting.rb
core/tmp/vendor/extensions/rspec_form_tests/app/models/refinery/rspec_form_tests/rspec_form_test.rb
core/tmp/vendor/extensions/rspec_form_tests/app/views
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/rspec_form_tests
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/rspec_form_tests/new.html.erb
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/rspec_form_tests/thank_you.html.erb
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/admin
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/admin/rspec_form_tests
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/admin/rspec_form_tests/spam.html.erb
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/admin/rspec_form_tests/show.html.erb
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/admin/rspec_form_tests/_rspec_form_test.html.erb
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/admin/rspec_form_tests/_records.html.erb
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/admin/rspec_form_tests/index.html.erb
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/admin/rspec_form_tests/_submenu.html.erb
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/admin/settings
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/admin/settings/_notification_recipients_form.html.erb
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/admin/settings/edit.html.erb
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/admin/settings/_confirmation_email_form.html.erb
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/mailer
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/mailer/notification.html.erb
core/tmp/vendor/extensions/rspec_form_tests/app/views/refinery/rspec_form_tests/mailer/confirmation.html.erb
core/tmp/vendor/extensions/rspec_form_tests/app/controllers
core/tmp/vendor/extensions/rspec_form_tests/app/controllers/refinery
core/tmp/vendor/extensions/rspec_form_tests/app/controllers/refinery/rspec_form_tests
core/tmp/vendor/extensions/rspec_form_tests/app/controllers/refinery/rspec_form_tests/admin
core/tmp/vendor/extensions/rspec_form_tests/app/controllers/refinery/rspec_form_tests/admin/settings_controller.rb
core/tmp/vendor/extensions/rspec_form_tests/app/controllers/refinery/rspec_form_tests/admin/rspec_form_tests_controller.rb
core/tmp/vendor/extensions/rspec_form_tests/app/controllers/refinery/rspec_form_tests/rspec_form_tests_controller.rb
core/tmp/vendor/extensions/rspec_form_tests/config
core/tmp/vendor/extensions/rspec_form_tests/config/routes.rb
core/tmp/vendor/extensions/rspec_form_tests/config/locales
core/tmp/vendor/extensions/rspec_form_tests/config/locales/ru.yml
core/tmp/vendor/extensions/rspec_form_tests/config/locales/es.yml
core/tmp/vendor/extensions/rspec_form_tests/config/locales/de.yml
core/tmp/vendor/extensions/rspec_form_tests/config/locales/it.yml
core/tmp/vendor/extensions/rspec_form_tests/config/locales/nl.yml
core/tmp/vendor/extensions/rspec_form_tests/config/locales/lv.yml
core/tmp/vendor/extensions/rspec_form_tests/config/locales/fr.yml
core/tmp/vendor/extensions/rspec_form_tests/config/locales/zh-CN.yml
core/tmp/vendor/extensions/rspec_form_tests/config/locales/en.yml
core/tmp/vendor/extensions/rspec_form_tests/config/locales/pt-BR.yml
core/tmp/vendor/extensions/rspec_form_tests/config/locales/sl.yml
core/tmp/vendor/extensions/rspec_form_tests/config/locales/nb.yml
core/tmp/vendor/extensions/rspec_form_tests/config/locales/da.yml
core/tmp/vendor/extensions/rspec_form_tests/lib
core/tmp/vendor/extensions/rspec_form_tests/lib/refinery
core/tmp/vendor/extensions/rspec_form_tests/lib/refinery/rspec_form_tests
core/tmp/vendor/extensions/rspec_form_tests/lib/refinery/rspec_form_tests/engine.rb
core/tmp/vendor/extensions/rspec_form_tests/lib/refinery/rspec_form_tests.rb
core/tmp/vendor/extensions/rspec_form_tests/lib/generators
core/tmp/vendor/extensions/rspec_form_tests/lib/generators/refinery
core/tmp/vendor/extensions/rspec_form_tests/lib/generators/refinery/rspec_form_tests_generator.rb
core/tmp/vendor/extensions/rspec_form_tests/lib/refinerycms-rspec_form_tests.rb
core/tmp/vendor/extensions/rspec_form_tests/refinerycms-rspec_form_tests.gemspec
core/tmp/vendor/extensions/rspec_form_tests/db
core/tmp/vendor/extensions/rspec_form_tests/db/seeds.rb
core/tmp/vendor/extensions/rspec_form_tests/db/migrate
core/tmp/vendor/extensions/rspec_form_tests/db/migrate/1_create_rspec_form_tests.rb
```