Default region incorrect for Rackspace resources

[Daniel Givens]

Pyrax 1.4.11 changed the way default regions are set.

https://github.com/rackspace/pyrax/issues/165

In using the "keystone" identity_type, the default region of 'RegionOne' is set which does not align with one of the Rackspace regions.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/47266

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/49568

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/49568
Committed: http://github.com/openstack/heat/commit/1318617103be85b22a785aa17cc0c0e424fcb0c9
Submitter: Jenkins
Branch: master

commit 1318617103be85b22a785aa17cc0c0e424fcb0c9
Author: Daniel Givens <email address hidden>
Date: Thu Oct 3 10:33:22 2013 -0500

    Change pyrax identity_type of Rackspace resources

    The Rackspace resources utilize the pyrax library. As of v1.4.11 of
    pyrax, the manner in which default region is determined changed, such
    that the keystone identity_type returned 'RegionOne' as the default
    region rather than one of the Rackspace regions. Changing the
    identity_type to rackspace fixes this.

    Change-Id: I36cd61393a76fbb9b0bb1fd4b31f26f6a95df3a3
    Closes-Bug: 1227387