HHH-18034 Configuration property hibernate.event.listener.eventType…

… should be more lenient against spaces

hibernate-core/src/main/java/org/hibernate/boot/internal/MetadataImpl.java

@@ -81,7 +81,7 @@
  * @author Gail Badner
  */
 public class MetadataImpl implements MetadataImplementor, Serializable {
-	private static final Pattern LISTENER_SEPARATION_PATTERN = Pattern.compile( " ," );
+	private static final Pattern LISTENER_SEPARATION_PATTERN = Pattern.compile( "\\s*,\\s*" );
 
 	private final UUID uuid;
 	private final MetadataBuildingOptions metadataBuildingOptions;