- Create concern to reuse the logic of detection of non-existent
translations in Controllers.
- Add detect_remote_translation method:
* This method will be called from controllers to recover resources
without translation.
* Receive arrays of resources.
* Return an array with hashes of remote_translations values for
every resources that have not translations.
* This array will be the param that will be sent from view to
RemoteTranslationController for create remote translations instances.
Both these objects where using/setting a variable called valid_orders.
As a results, some specs where becoming flacky
(features/budgets/investments_spec.rb, balloting phase). By putting
them together, there is no `valid_orders` variable any more (everything
is @valid_orders) and the flackyness is gone.
