Audit middleware doesnt handle endpoints if missing any of public, internal or admin URL

[Ankita Wagh]

using the audit middleware

When target tries to retrieve information for endpoints from service catelog, it doesnt handle cases when any of public , internal or admin URL are missing.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/179624

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/179624
Committed: https://git.openstack.org/cgit/openstack/keystonemiddleware/commit/?id=47fed2f1fd5539a12b1d79e0db35b7d3f71afa20
Submitter: Jenkins
Branch: master

commit 47fed2f1fd5539a12b1d79e0db35b7d3f71afa20
Author: ankita_wagh <email address hidden>
Date: Sat May 2 21:35:19 2015 -0700

    Improved handling of endpoints missing urls

    Currently if any of the interface urls (public, admin or internal) are
    missing, audit middleware will break. This patch attempts to address
    this issue.

    Closes Bug: #1450868

    Change-Id: Ic3484a81454a41b2a7e924f0bc23f854211cc513