Upgrade to HSQLDB 2.3.1

Replace `hsqldb:hsqldb:1.8.0.10` with `org.hsqldb:hsqldb:2.3.1` and
fix breaking tests.

Issue: SPR-10947

spring-test/src/test/java/org/springframework/test/context/junit4/orm/HibernateSessionFlushingTests.java

@@ -109,7 +109,7 @@ public class HibernateSessionFlushingTests extends AbstractTransactionalJUnit4Sp
 		// finally flushed (i.e., in production code)
 	}
 
-	@Test(expected = GenericJDBCException.class)
+	@Test(expected = ConstraintViolationException.class)
 	public void updateSamWithNullDriversLicenseWithSessionFlush() {
 		updateSamWithNullDriversLicense();
 		// Manual flush is required to avoid false positive in test

spring-test/src/test/java/org/springframework/test/context/junit4/orm/db-schema.sql

@@ -2,7 +2,7 @@ DROP TABLE drivers_license IF EXISTS;
 DROP TABLE person IF EXISTS;
 
 CREATE TABLE person (
-	id INTEGER NOT NULL IDENTITY PRIMARY KEY,
+	id INTEGER NOT NULL IDENTITY,
 	name VARCHAR(50) NOT NULL,
 	drivers_license_id INTEGER NOT NULL
 );
@@ -10,7 +10,7 @@ CREATE UNIQUE INDEX person_name ON person(name);
 CREATE UNIQUE INDEX person_drivers_license_id ON person(drivers_license_id);
 
 CREATE TABLE drivers_license (
-	id INTEGER NOT NULL IDENTITY PRIMARY KEY,
+	id INTEGER NOT NULL IDENTITY,
 	license_number INTEGER NOT NULL
 );
 CREATE UNIQUE INDEX drivers_license_license_number ON drivers_license(license_number);

spring-test/src/test/java/org/springframework/test/context/junit4/spr8849/spr8849-schema.sql

@@ -1,3 +1,3 @@
 CREATE TABLE enigma (
-	id INTEGER NOT NULL IDENTITY PRIMARY KEY
+	id INTEGER NOT NULL IDENTITY
 );