ISPN-3937 Investigate the memory usage of JDBC cache stores when process...

...ing a large result set

* Set the result type to TYPE_FORWARD_ONLY and the concurrency to CONCUR_READ_ONLY
* For the particular case of MySQL, setting the fetchSite to MIN_VALUE will fethc
since row at the time

https://issues.jboss.org/browse/ISPN-3937