Open Stack

Hi, I'd like you to take a look at this patch for potential
DocImpact.
https://review.openstack.org/23309

Log:
commit 3aeb012cb5d3b89128c8d7f5aa64880bccd13f3e
Author: Vishvananda Ishaya <vishvananda at gmail.com>
Date:   Fri Mar 1 10:15:26 2013 -0800

    Cache tokens using memorycache from oslo.
    
    Verifying tokens accounts for a significant portion of the time taken
    by the various api servers. This copies the simple memory cache over
    from nova so that there is a simple default cache even if memcached
    is not deployed.
    
    DocImpact
    
    Change-Id: I501c14f2f51da058cb574c32d49dd769e6f6ad86