Open Stack

Hi, I'd like you to take a look at this patch for potential
DocImpact.
https://review.openstack.org/33409

Log:
commit 6dc1e3b3f72d06f8095d42e8d2b726922f952f73
Author: Zhi Yan Liu <zhiyanl at cn.ibm.com>
Date:   Sat Jun 15 21:25:34 2013 +0800

    Adding image multiple location support
    
    Image now support multiple locations within its metadata and it maybe
    stored more then one backend storage. Nova should add a layer to
    transparent handle image preparing and removing for an instance by the
    best approach/location, and it should allow administrator to configure
    the image handler pipline with the order who preferred to the layer.
    
    Also, base on this structure we could implement particular sub-class in
    relevant hypervisor layer with more advanced functions, such as COW
    making, snapshot capturing and etc. in feature.
    
    Implement bp: image-multiple-location
    docimpact
    
    Change-Id: Idce8d21ae37bfdbb28a2567120a83d1061061904
    Signed-off-by: Zhi Yan Liu <zhiyanl at cn.ibm.com>

Automatically generated bug (please review):
https://bugs.launchpad.net/bugs/1192462