Comment 2 for bug 1505750

Reviewed: https://review.openstack.org/233506
Committed: https://git.openstack.org/cgit/openstack/congress/commit/?id=6474767b17b128b583c9758d69c878873685f7a1
Submitter: Jenkins
Branch: master

commit 6474767b17b128b583c9758d69c878873685f7a1
Author: Yingxin Cheng <email address hidden>
Date: Mon Oct 12 14:58:03 2015 +0800

    Change devstack to OS_PROJECT_NAME and avoid mocking oslo.policy internals

    To pass the tests in gate, this commit has 2 separate changes

    1) OS_TENANT_NAME is no longer used in the latest devstack, it causes all
    datasource driver fail, as well as jenkins gate failure.

    This fix changes devstack to use OS_PROJECT_NAME

    2) Previously, we tested oslo.policy by mocking out one of the internals
    of oslo.policy, just like Neutron. Besides being improper, the newest
    release of oslo.policy broke that test, which is what is blocking
    the tip of master currently.

    This fix shamelessly copies the fix out of Neutron, mocking out
    at the layer of HTTPCheck.

    Change-Id: I2a4eae714946ce98a060a43dd501b9b3619aa68e
    Closes-Bug: #1505057
    Closes-bug: #1505750