Comment 9 for bug 1160489

Reviewed: https://review.openstack.org/25433
Committed: http://github.com/openstack/nova/commit/985d703d2731fe9ec968ef6698bbf39743ede32a
Submitter: Jenkins
Branch: master

commit 985d703d2731fe9ec968ef6698bbf39743ede32a
Author: Dan Smith <email address hidden>
Date: Tue Mar 26 13:14:56 2013 -0700

    Always store old instance_type during a migration

    Previously, we were trying to optimize for the migration (as opposed
    to resize) case by not storing the old_ instance_type. However,
    this is confusing to the vast amount of shared code that works on
    migrations and resizes because the "is old == new" logic must be
    replicated everywhere. To cut our losses and hopefully avoid other
    hidden dragons, this patch removes the optimization and makes both
    paths the same.

    Fixes bug #1160489

    Change-Id: I2ad7b02239baada5fd2174f5b61cdc90ec91e6f5