Use active model translations for labels

The same way we did for Active Record, but this time we do it for models
not inheriting fom Active Record.

config/locales/en/activemodel.yml

@@ -19,6 +19,19 @@ en:
           confirmation_code: "Confirmation code"
         email:
           recipient: "Email"
+      verification/letter:
+        email: "Email"
+        password: "Password"
+        verification_code: "Code you received in letter"
+      verification/management/document:
+        document_type: "Document type:"
+        document_number: "Document number"
+      verification/residence:
+        date_of_birth: "Date of birth"
+        document_type: "Document type"
+        postal_code: "Postcode"
+      verification/sms:
+        confirmation_code: "Enter the code you received on your mobile"
       officing/residence:
         document_type: "Document type"
         document_number: "Document number (including letters)"

config/locales/en/management.yml

@@ -32,8 +32,6 @@ en:
       index:
         title: Management
         info: Here you can manage users through all actions listed in the left menu.
-    document_number: Document number
-    document_type_label: Document type
     document_verifications:
       already_verified: This user account is already verified.
       has_no_account_html: In order to create an account, go to %{link} and click in <b>"Register"</b> in the upper-left part of the screen.

config/locales/en/pages.yml

@@ -143,10 +143,7 @@ en:
     titles:
       help: "What is %{org}? - Citizen participation"
     verify:
-      code: Code you received in letter
-      email: Email
       info: "To verify your account introduce your access data:"
       info_code: "Now introduce the code you received in letter:"
-      password: Password
       submit: Verify my account
       title: Verify your account

config/locales/en/verification.yml

@@ -47,7 +47,6 @@ en:
       new:
         accept_terms_text: I accept %{terms_url} of the Census
         accept_terms_text_title: I accept the terms and conditions of access of the Census
-        date_of_birth: Date of birth
         document_number: Document number
         document_number_help_title: Help
         document_number_help_text_html: "<strong>DNI</strong>: 12345678A<br> <strong>Passport</strong>: AAA000001<br> <strong>Residence card</strong>: X1234567P"
@@ -55,12 +54,10 @@ en:
           passport: Passport
           residence_card: Residence card
           spanish_id: DNI
-        document_type_label: Document type
         error_not_allowed_age: You don't have the required age to participate
         error_not_allowed_postal_code: In order to be verified, you must be registered.
         error_verifying_census: The Census was unable to verify your information. Please confirm that your census details are correct by calling to City Council or visit one Citizen Support Office.
         form_errors: prevented the verification of your residence
-        postal_code: Postcode
         postal_code_note: To verify your account you must be registered
         terms: the terms and conditions of access
         title: Verify residence
@@ -70,7 +67,6 @@ en:
         flash:
           success: Enter the confirmation code sent to you by text message
       edit:
-        confirmation_code: Enter the code you received on your mobile
         resend_sms_link: Click here to send it again
         resend_sms_text: Didn't get a text with your confirmation code?
         submit_button: Send