This change updates our worker section so that we're not spawning so may
worker threads in the AIO. This simple change allows us to save quite a
bit of memory which is extremely important when running in an resource
constrained environment.
Example Before:
total used free shared buff/cache available
Mem: 15G 8.3G 295M 422M 7.1G 6.5G
Swap: 1.0G 14M 1.0G
Example After:
total used free shared buff/cache available
Mem: 15G 5.6G 4.4G 458M 5.7G 9.1G
Swap: 1.0G 13M 1.0G
Change-Id: I001d67423e0ba7196c536e2d3fad616604842a40
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>