Keystone v3 tests seen as failed due to missing param in conf

[Morgan Richomme]

When running the Tempest suite through Rally, keystone v3 tests are shown as failed.
If you add one line (admin_domain_name=default) in the auto generated tempest.conf file then the tests are OK

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/187481

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/187481
Committed: https://git.openstack.org/cgit/openstack/rally/commit/?id=238ca0c3d257bdcdefe61f917edbc2c47ef6e93c
Submitter: Jenkins
Branch: master

commit 238ca0c3d257bdcdefe61f917edbc2c47ef6e93c
Author: morganrOL <email address hidden>
Date: Mon Jun 1 17:21:15 2015 +0200

    tempest: add `admin_domain_name' to generated conf

    Add admin_domain_name=default of autogenerated tempest.conf
    This line prevents the keystone v3 related tests to be declared as failure.

    Closes-Bug:1460680

    Change-Id: I9e0eeb2e9392df17fc0e0c71bf9268482e921ac9
    Signed-off-by: morganrOL <email address hidden>