SQLQueryFactory doesn't release connection / leak

[noguespi]

The SQLQueryFactory is cleaner than new SQLQuery, however, it doesn't close the connection

        SQLQueryFactory qf = new SQLQueryFactory(sqlConf, ds);
        for (int i = 0; i < 20; i++) {
            qf.selectOne().from(TABLE).fetch();
        }

and you have 20 connections open.