Comment 6 for bug 1175207

Reviewed: https://review.openstack.org/47721
Committed: http://github.com/openstack/cinder/commit/8aedc3ed1cd6dd59362882baddc222491cf064e7
Submitter: Jenkins
Branch: stable/grizzly

commit 8aedc3ed1cd6dd59362882baddc222491cf064e7
Author: John Griffith <email address hidden>
Date: Wed May 1 11:26:18 2013 -0600

    Remove old_name from kwargs when using IET helper.

    The IET driver passes the input kwargs from export
    directly to the IET driver, but one of the keys here
    is specifically for migration and a bug associated with
    going from nova-vol to cinder-uuid's.

    This patch just checks in the IET code if we have the key set
    and if so pops it out before passing through to iet.

    Cherry picked: db991e6638533fb019fa5dcf59235d7302ae426e
    Fixes bug: 1175207
    Fixes bug: 1212206

    Change-Id: I965bdfbe078d61b906aebc48961c1806a9fb0c59