Add discount price to AllocationToken (#2559)

* Include discount price in domai n pricing

* Partial progress in logic

* Tests and logic passing

* Change pricing for multi year create

* Tests for discount pricing logic

* Token currency check

* Add some comments

* Java formatting

* Discount price to Optional

* Change discount price to be optional nullable

* Re-add deleted tests

db/src/main/resources/sql/schema/db-schema.sql.generated

@@ -21,6 +21,8 @@
         creation_time timestamp(6) with time zone not null,
         discount_fraction float(53) not null,
         discount_premiums boolean not null,
+        discount_price_amount numeric(19,2),
+        discount_price_currency text,
         discount_years integer not null,
         domain_name text,
         redemption_domain_repo_id text,