Increase the number of oustanding requests per session to 2048
Increase the number of oustanding requests per session to 2048

This allows for the 1024 reads plus 512 writes reported currently by the
Toshiba drives, as well as having some extra room, so that the
throttling comes from the software above, not the library.

rcrane/kinetic-c,rcrane/kinetic-c,rcrane/kinetic-c,rcrane/kinetic-c