v3 server's rebuild with access_ip_* doesn't work for xml format

[Alex Xu]

        if node.hasAttribute("access_ipv4"):
            rebuild["access_ip_v4"] = node.getAttribute("access_ip_v4")

        if node.hasAttribute("access_ipv6"):
            rebuild["access_ip_v6"] = node.getAttribute("access_ip_v6")

access_ipv4 should be access_ip_v4

We can't merge this patch https://review.openstack.org/#/c/41349/
So we need fix current code.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/45421

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/45421
Committed: http://github.com/openstack/nova/commit/9501fa954b4d724b665207c2a0188e92f691fdfb
Submitter: Jenkins
Branch: master

commit 9501fa954b4d724b665207c2a0188e92f691fdfb
Author: He Jie Xu <email address hidden>
Date: Fri Sep 6 20:48:48 2013 +0800

    Fix v3 server rebuild deserializer checking with wrong access_ip key

    When rebuild server with xml format, the xml deserializer code
    are checking with wrong key. So rebuilding with access_ips doesn't
    make any effect. So correct the wrong key 'access_ipv4', 'access_ipv6'
    to 'access_ip_v4', 'access_ip_v6'.

    Change-Id: I8fccf3727f193bf9142dc814a76a32d5ab1a1b0a
    Closes-bug: #1221646