HSEARCH-4783 Fix iteration order on AutomaticIndexingBridge*IT

Otherwise these tests fail randomly on DB2, in particular with ORM 6.

integrationtest/mapper/orm/src/test/java/org/hibernate/search/integrationtest/mapper/orm/automaticindexing/bridge/AbstractAutomaticIndexingBridgeIT.java

@@ -723,6 +723,7 @@ public static class ContainingEntity {
 		private ContainingEntity association2InverseSide;
 
 		@OneToMany(mappedBy = "association2InverseSide")
+		@OrderBy("id asc") // Make sure the iteration order is predictable
 		private List<ContainingEntity> association2;
 
 		@ManyToOne