xenapi: vcpu weight not applying because cap is missing

[John Garbutt]

Some versions of XenServer (need to confirm which) have an issue where the vcpu weight is ignored if you don't specify the vcpu cap.

[John Garbutt (johngarbutt)]

Apparently it affects XenServer 6.1 and 6.2.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/42667

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/42667
Committed: http://github.com/openstack/nova/commit/55faf381704b8affadf9a663c76a28996922ffab
Submitter: Jenkins
Branch: master

commit 55faf381704b8affadf9a663c76a28996922ffab
Author: John Garbutt <email address hidden>
Date: Mon Aug 19 16:11:38 2013 +0100

    xenapi: set vcpu cap to ensure weight is applied

    There is a bug in XenServer 6.1 and 6.2 that means the vcpu weight
    we set is ignored if the cap is not also set.

    Setting the cap to its default of 0, meaning no cap, to ensure the
    weight value is applied.

    Fixes bug 1213960
    Change-Id: I367a9afe188734cf5e95c01fc014b9044003d6e3