Unable to upload package using tempest user 'demo'

[Victor Ryzhenkin]

Tempest user 'demo' just a member in 'demo' tetant and have no rights to upload package.
Because of this, tests for caongess integration fails with 403 code.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/162635

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/162635
Committed: https://git.openstack.org/cgit/stackforge/murano/commit/?id=2c447cf1ba08e631062cf27360cef888c1588535
Submitter: Jenkins
Branch: master

commit 2c447cf1ba08e631062cf27360cef888c1588535
Author: vryzhenkin <email address hidden>
Date: Mon Mar 9 16:34:56 2015 +0300

    Added iniset for policy_enforcer if Congress policies are enabled

    - Added iniset for enable_model_policy_enforcer in murano.conf
      if MURANO_ENABLE_MODEL_POLICY_ENFORCEMENT is True
    - Fixed keystone auth in tempest_utils.py

    Change-Id: Icd15b4e31778ca6005b832b3d5224d929e2f0b83
    Closes-Bug: #1429855
    Closes-Bug: #1429856