Always use TYPE_FORWARD_ONLY and CONCUR_READ_ONLY on SAP HANA database

SAP HANA database supports only the result set type TYPE_FORWARD_ONLY with concurrency mode CONCUR_READ_ONLY. Change the tests so that they use these settings when executed on SAP HANA database.

See bug 384116

Signed-off-by: Sabine Heider <sabine.heider@sap.com>