Log a warning when there is keystone misconfiguration

[Lin Hua Cheng]

openstack_auth automatically handles updating the given keytone_url too v2 or v3 based on the keystone version used.

This case should not really happen, but if it does it should log a warning when the replace occured.

See comments: https://review.openstack.org/#/c/70479/4/openstack_auth/backend.py

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/81393

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/81393
Committed: https://git.openstack.org/cgit/openstack/django_openstack_auth/commit/?id=c1dbc6a38f1586f5a965985acc8b081c4f69ee03
Submitter: Jenkins
Branch: master

commit c1dbc6a38f1586f5a965985acc8b081c4f69ee03
Author: David Lyle <email address hidden>
Date: Tue Mar 18 16:58:55 2014 -0600

    Adding log message for keystone API mismatch

    When the Horizon settings file specifies a v2.0 endpoint and
    indicates v3 API to use with Keystone, the code redirects the
    v2.0 to v3 without notice. Logging a warning, so deployers can
    address the mismatch.

    Closes-Bug: #1291457
    Change-Id: If9e9e40af5ac23e8dea552d2d1a04597c67837a7