Volume extend does not properly cast to int

[Andrew Kerr]

In cinder/volume/manager.py:

self.driver.extend_volume(volume, new_size)

does not cast new_size to int, this can cause failures, especially when using XML API, when the new_size is being interpreted as unicode by python.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/71937

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/72721
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=26f9b33085b20a3967299a4d3b2ec871bd6a40d0
Submitter: Jenkins
Branch: master

commit 26f9b33085b20a3967299a4d3b2ec871bd6a40d0
Author: Glenn M. Gobeli <email address hidden>
Date: Tue Feb 11 13:03:13 2014 -0500

    Changes to cast variable as integer as XML API fails.

    Code change to ensure that the type of the size variable is correct
    when cinder is invoked through XML API. The extend volume code path
    differs from volume create where the flow portion verifies that the
    size variable is an integer; for extend the earliest place to cast
    the size variable is in volume_actions.py.

    Change-Id: Iaaed463f988769b8093604cd3b677b270dd2c5cd
    Closes-bug: 1277233