Open Stack

Hi, I'd like you to take a look at this patch for potential
DocImpact.
https://review.openstack.org/17961

Log:
commit 5d4ad8e2220470b86ec53a6c76696f286ffae9ba
Author: Kravchenko Pavel <kpavel at il.ibm.com>
Date:   Wed Dec 19 22:38:16 2012 +0200

    Add to libvirt driver instance_on_disk method
    
    Added method to driver layer to validate that instance directory
    accessible from the host.
    
    part of libvirt driver support for blueprint rebuild-for-ha
    
    DocImpact
    
    Change-Id: I9c6a3aec99f61bd4fb6bc4b4264771e077aae96a
    Co-authored-by: Oshrit Feder <oshritf at il.ibm.com>