Updated openstack/openstack
Project: openstack/nova  3e5a08e4210ab079d2938a01cc435be88f09bc71
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libvirt: Configuration element for sVirt support

This configuration is need to allow users to enable sVirt support,
which is by default disabled for lxc.

In addition to a dynamic configuration, the users will be able to
provide a base label

Partially implements: blueprint libvirt-enable-lxc-svirt
Change-Id: Iacb6fcfb66379fbae900e8e9909377bf5ce18409