UiO: Sjekk om fødselsnummer/passnummer er i bruk i IGA

Se hver enkelt commit for detaljer.

frontend/public/locales/en/common.json

@@ -52,7 +52,11 @@
     "consentName": "Consent type",
     "roleInfoHead": "Roles and periods",
     "roleInfoTableText": "Guest roles",
-    "roleInfoBody": "You can only change roles that you have given."
+    "roleInfoBody": "You can only change roles that you have given.",
+    "identityCheck": {
+      "failure": "<strong>Warning</strong>: Unable to check if person already exists in IGA.",
+      "text": "<strong>Warning</strong>: <1>matches</1> already has this ID registerered to them. Please stop if this is not the same person."
+    }
   },
   "guest": {
     "headerText": "Add new role and period.",