Add support for SO numbers

Adds the possibility of using SO numbers when registering in GREG.

frontend/public/locales/en/common.json

@@ -11,7 +11,7 @@
     "firstName": "First name",
     "lastName": "Last name",
     "dateOfBirth": "Date of birth",
-    "nationalIdNumber": "National ID number",
+    "nationalIdNumber": "Norwegian national ID number",
     "roleType": "Role",
     "roleStartDate": "From",
     "roleEndDate": "To (including)",
@@ -114,13 +114,13 @@
     "invitationExpired": "Invitation expired"
   },
   "details": "Details",
-  "nationalIdNumber": "National ID number",
+  "nationalIdNumber": "Norwegian national ID number",
   "validation": {
     "firstNameRequired": "First name is required",
     "lastNameRequired": "Last name is required",
     "dateOfBirthRequired": "Date of birth is required",
-    "invalidIdNumber": "Invalid national ID number",
-    "nationalIdNumberRequired": "National ID number required",
+    "invalidIdNumber": "Invalid Norwegian national ID number",
+    "nationalIdNumberRequired": "Norwegian national ID number required",
     "roleTypeRequired": "Role type is required",
     "roleEndRequired": "Role end date is required",
     "emailRequired": "E-mail is required",
@@ -135,8 +135,8 @@
     "startDateMustBeBeforeEndDate": "Start date has to be before end date",
     "phoneNumberAndCountryCode": "Both country code and phone number must be set",
     "passportNationalityAndNumber": "Both passport nationality and number need to be set",
-    "doubleIdentity": "*You have input both national ID and passport. Please choose only one.",
-    "nationalIdOrPassport": "National ID or passport information need to be entered",
+    "doubleIdentity": "*You have input both Norwegian national ID and passport. Please choose only one.",
+    "nationalIdOrPassport": "Norwegian national ID number or passport information need to be entered",
     "genderIsRequired": "Gender is required"
   },
   "button": {
@@ -211,11 +211,11 @@
       "invalid_invite": "Invalid invite",
       "invite_expired": "Invite has expired",
       "cannot_update_fields": "Failed to update data",
-      "update_national_id_not_allowed": "Not allowed to update verified national ID",
+      "update_national_id_not_allowed": "Not allowed to update verified Norwegian ID",
       "invite_email_failed": "There was a problem sending the invite e-mail. Contact support.",
       "duplicate_private_email": "There is already a guest with the registered e-mail",
       "duplicate_private_mobile_number": "There is already a guest with the registered mobile phone number",
-      "duplicate_private_national_id_number": "There is already a guest with the national ID number given",
+      "duplicate_private_national_id_number": "There is already a guest with the Norwegian national ID number given",
       "duplicate_private_passport_number": "There is already a guest with the passport number given"
     }
   },