Adjust grants after migration and give read access to DVH

src/main/resources/db/migration/V1_6__grant_dvh.sql

@@ -1 +1,9 @@
+DO $$
+BEGIN
+  CREATE USER "[email protected]";
+  EXCEPTION WHEN DUPLICATE_OBJECT THEN
+  RAISE NOTICE 'not creating user disykefravar -- it already exists';
+END
+$$;
+
 GRANT SELECT ON motebehov to "[email protected]";