OracleChangeNotificationListener - enable to set Oracle JDBC connection properties via persistence.xml

[rfelcman]

This is new feature request to make OracleChangeNotificationListener properties more flexible. It can be helpful if some Oracle JDBC connection properties like

            Properties properties = new Properties();
            properties.setProperty(OracleConnection.DCN_NOTIFY_ROWIDS, "true");
            properties.setProperty(OracleConnection.DCN_IGNORE_INSERTOP, "true");
            properties.setProperty(OracleConnection.DCN_CLIENT_INIT_CONNECTION, "true");
            this.register = connection.registerDatabaseChangeNotification(properties);

should be set via Persistence Properties e.g. via persistence.xml.

See https://github.com/eclipse-ee4j/eclipselink/blob/master/foundation/org.eclipse.persistence.oracle/src/main/java/org/eclipse/persistence/platform/database/oracle/dcn/OracleChangeNotificationListener.java#L102