Open Stack

Hi, I'd like you to take a look at this patch for potential
DocImpact.
https://review.openstack.org/32379

Log:
commit 5c6269a6d0c6fbe13120f9a559fb2fc45542674f
Author: Alvaro Lopez Garcia <aloga at ifca.unican.es>
Date:   Fri Jun 7 11:01:16 2013 +0200

    Select disk driver for libvirt+Xen according to the Xen version
    
    There are two versions of the blktap [1] driver available under Xen.
    blktap1 has been replaced by blktap2 that does not support "tap"
    devices but "tap2", therefore we should use "tap2" devices by default.
    
    Fixes bug 1188517
    Fixes bug 1084618
    DocImpact
    
    Change-Id: I8b46885b0909de7cb51fd2d0f6ba2e9bcbf33cc6

Automatically generated bug (please review):
https://bugs.launchpad.net/bugs/1196874