remove some unnecessary typecasts in tests

(there's many more like these, of course!)

Author: gavinking

hibernate-core/src/test/java/org/hibernate/orm/test/associations/any/AnyTest.java

@@ -89,7 +89,7 @@ public void testMetaAnnotated() {
 			final PropertyHolder2 propertyHolder = session.get( PropertyHolder2.class, 2L );
 			assertEquals( "name2", propertyHolder.getProperty().getName() );
 			assertEquals( "Mario Rossi", propertyHolder.getProperty().getValue() );
-			final String propertyType = (String) session.createNativeQuery(
+			final String propertyType = session.createNativeQuery(
 					"select property_type from property_holder2",
 					String.class
 			).getSingleResult();

hibernate-core/src/test/java/org/hibernate/orm/test/flush/AutoFlushTest.java

@@ -129,9 +129,8 @@ public void testFlushAutoSQLNativeSession() {
 			//		or using Hibernate's FlushMode enum
 			//session.setHibernateFlushMode(FlushMode.COMMIT);
 
-			assertTrue(((Number) session
-					.createNativeQuery("select count(*) from Person", Integer.class)
-					.uniqueResult()).intValue() == 0);
+			assertTrue( session.createNativeQuery( "select count(*) from Person", Integer.class )
+					.uniqueResult() == 0);
 			//end::flushing-auto-flush-sql-native-example[]
 		});
 	}
@@ -152,10 +151,9 @@ public void testFlushAutoSQLSynchronization() {
 			entityManager.persist(person);
 			Session session = entityManager.unwrap(Session.class);
 
-			assertTrue(((Number) session
-					.createNativeQuery("select count(*) from Person", Integer.class)
-					.addSynchronizedEntityClass(Person.class)
-					.uniqueResult()).intValue() == 1);
+			assertTrue( session.createNativeQuery( "select count(*) from Person", Integer.class )
+					.addSynchronizedEntityClass( Person.class )
+					.uniqueResult() == 1);
 			//end::flushing-auto-flush-sql-synchronization-example[]
 		});
 	}

hibernate-core/src/test/java/org/hibernate/orm/test/flush/HibernateAutoFlushTest.java

@@ -35,16 +35,14 @@ public void testFlushAutoSQLNativeSession() {
 		doInHibernate(this::sessionFactory, session -> {
 			log.info("testFlushAutoSQLNativeSession");
 			//tag::flushing-auto-flush-sql-native-example[]
-			assertTrue(((Number) session
-					.createNativeQuery("select count(*) from Person", Integer.class)
-					.getSingleResult()).intValue() == 0);
+			assertTrue( session.createNativeQuery( "select count(*) from Person", Integer.class )
+					.getSingleResult() == 0);
 
 			Person person = new Person("John Doe");
 			session.persist(person);
 
-			assertTrue(((Number) session
-					.createNativeQuery("select count(*) from Person", Integer.class)
-					.uniqueResult()).intValue() == 0);
+			assertTrue( session.createNativeQuery( "select count(*) from Person", Integer.class )
+					.uniqueResult() == 0);
 			//end::flushing-auto-flush-sql-native-example[]
 		});
 	}

hibernate-core/src/test/java/org/hibernate/orm/test/flush/ManualFlushTest.java

@@ -55,9 +55,8 @@ public void testFlushSQL() {
 				.createQuery("select count(id) from Person")
 				.getSingleResult()).intValue() == 0);
 
-			assertTrue(((Number) session
-				.createNativeQuery("select count(*) from Person", Integer.class)
-				.uniqueResult()).intValue() == 0);
+			assertTrue( session.createNativeQuery( "select count(*) from Person", Integer.class )
+					.uniqueResult() == 0);
 			//end::flushing-manual-flush-example[]
 		});
 	}

hibernate-core/src/test/java/org/hibernate/orm/test/multitenancy/DatabaseTimeZoneMultiTenancyTest.java

@@ -137,7 +137,7 @@ public void testBasicExpectedBehavior() {
 		}, true);
 
 		doInSession(FRONT_END_TENANT, session -> {
-			Timestamp personCreationTimestamp = (Timestamp) session
+			Timestamp personCreationTimestamp = session
 			.createNativeQuery(
 				"select p.created_on " +
 				"from Person p " +
@@ -152,7 +152,7 @@ public void testBasicExpectedBehavior() {
 		}, true);
 
 		doInSession(BACK_END_TENANT, session -> {
-			Timestamp personCreationTimestamp = (Timestamp) session
+			Timestamp personCreationTimestamp = session
 			.createNativeQuery(
 				"select p.created_on " +
 				"from Person p " +
@@ -169,7 +169,7 @@ public void testBasicExpectedBehavior() {
 
 		//tag::multitenacy-hibernate-not-applying-timezone-configuration-example[]
 		doInSession(FRONT_END_TENANT, session -> {
-			Timestamp personCreationTimestamp = (Timestamp) session
+			Timestamp personCreationTimestamp = session
 			.createNativeQuery(
 				"select p.created_on " +
 				"from Person p " +