Improvements at response from API when generate root certificate

[vitormattos]

Scenario

When we don't fill the field "Name (CN)" and click at the button "Generate root certificate" we will see the message:

We need to see the message:

Name (CN) is required

Tips

Search by 'Name (CN)' in the code and search by 'parameter '{$key}' is required'. You will see that the array with the translated name stay at frontend and the text in backend. You also will found parameters here: apps-extra/libresign/src/helpers/certification.js

To-do

Will be necessary move the parameters names to backend because the validation occur at API side. To do this you will need to move the file apps-extra/libresign/src/helpers/certification.js to be a helper in API side and return this as JSON in an initial state to frontend.