Need way to choose which region to get a url_for

[Rob Raymond]

Much of the api code in horizon uses base.url_for to find a service in the service catalog. Currently url_for uses the region stored on the session but sometimes some horizon code knows what region it needs to talk to. (One use case could be heat would want to allow composition of services from multiple endpoints.)

url_for should allow override of region when choosing an endpoint.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/48361

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/48361
Committed: http://github.com/openstack/horizon/commit/2cdd0bb20e9dbf217627462d49ffb9ac1bf829ab
Submitter: Jenkins
Branch: master

commit 2cdd0bb20e9dbf217627462d49ffb9ac1bf829ab
Author: Rob Raymond <email address hidden>
Date: Wed Sep 25 16:42:04 2013 -0600

    Allow region override for url_for

    If region is passed in to url_for use that, otherwise continue
    to use the region from the user's session.

    Fixes bug #1231171

    Change-Id: Ia7d2a4f12a3c0d4d45bb918255184d1736f5bddf