xenapi: don't refetch network_info when building config drive

[John Garbutt]

There is no need to refetch the network_info when building config_drive, we can just pass through the network_info we already have.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/46290

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/46290
Committed: http://github.com/openstack/nova/commit/137a1cd9c1df3026f0b7faa10bb10517916f5756
Submitter: Jenkins
Branch: master

commit 137a1cd9c1df3026f0b7faa10bb10517916f5756
Author: John Garbutt <email address hidden>
Date: Fri Sep 6 13:15:32 2013 +0100

    xeanpi: pass network_info to generate_configdrive

    Currently network_info is being fetched when generating config drive.
    This change ensures the network_info that is already available is
    re-used when generating the config_drive.

    In addition, it is more consistent to use the network_info that is
    passed into this function, rather than potentially lazy loading the
    whole info_cache of the instance from the DB, which may not yet be
    populated when we are generating the metadata for ConfigDrive anyway.

    Fixes bug 1224508
    Change-Id: I3e6f5a987593ecd422be61ac50c0d74463ba25d5