Configure H2 database and add repositories

src/main/resources/data.sql

@@ -0,0 +1,5 @@
+INSERT INTO ADDRESS (id, street, number, postal_code, country)
+values (1, 'street', 1, 9999, 'Luxembourg');
+
+INSERT INTO BANKING_USER (id, username, password, address_id)
+values (1, 'user1', 'test', 1);