[Bug 1418187] Related fix merged to nova (master)

[OpenStack Infra]

Reviewed:  https://review.openstack.org/160904
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=291c1a1db1ab3ceccfac7a3c8312b6fdce3aaa84
Submitter: Jenkins
Branch:    master

commit 291c1a1db1ab3ceccfac7a3c8312b6fdce3aaa84
Author: Sahid Orentino Ferdjaoui <sahid.ferdjaoui at redhat.com>
Date:   Tue Mar 3 05:00:40 2015 -0500

    libvirt: make default value of numa cell memory to 0 when not defined
    
    Some arch can have cells without memory or cpus defined and libvirt
    will return an XML without these elements. Our object defintion of the
    fields cpus and memory cannot let us to make them to None when not
    defined but currently the config representation of a NUMA make it to
    None.
    
    This patch fix the default value of config memory to 0 when libvirt
    does not return memory element for a cell.
    
    Also this cannot be considered come a fix for bug 1418187 since we
    have to handle these cases (cpus or memory not defined) during
    scheduling. thse case can be addressed when using distances which will
    be addressed in a next serie of patches.
    
    Related-Bug: #1418187
    Change-Id: Iac08d1221341a86c081d5e905c704fb1c9dca276

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Title:
  _get_host_numa_topology assumes numa cell has memory

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