Don't inject files while resizing instance

[wangpan]

As the code owner of method 'finish_migration' in libvirt driver, the files injecting operation is not necessary during resize, because they have already injected when creating the instance, so add a parameter to fix this issue.

def finish_migration(self, context, migration, instance, disk_info,
                         network_info, image_meta, resize_instance,
                         block_device_info=None, power_on=True):
    ......
    # TODO(oda): injecting files is not necessary
    self._create_image(context, instance,
                           disk_mapping=disk_info['mapping'],
                           network_info=network_info,
                           block_device_info=None)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/40354

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/40354
Committed: http://github.com/openstack/nova/commit/68b6d1e31ffdc77aae8b9bad2c769109bb5473dd
Submitter: Jenkins
Branch: master

commit 68b6d1e31ffdc77aae8b9bad2c769109bb5473dd
Author: Wangpan <email address hidden>
Date: Tue Aug 6 14:10:57 2013 +0800

    Don't inject files while resizing instance

    Fixes bug 1208680

    As what the code owner of method 'finish_migration' in libvirt driver
    said, the files injecting operation is not necessary during resize,
    because they have already been injected when creating the instance,
    so added a parameter to _create_image to fix this issue, which is used
    for identifying the injection is needed or not.

    Change-Id: I01990de0ad2c7f1c2e499144034b7a4ac9faf024