Role inheritance section in configuration.rst is outdated

[Samuel de Medeiros Queiroz]

Now that hierarchical projects were introduced, inherited role assignments also applies to project hierarchies.

The 'Inherited Role Assignment Extension' section at doc/source/configuration.rst needs to be updated.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/146261

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/146261
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=984fdbc38e1655a9462068c5bf16d7c257088054
Submitter: Jenkins
Branch: master

commit 984fdbc38e1655a9462068c5bf16d7c257088054
Author: Samuel de Medeiros Queiroz <email address hidden>
Date: Sat Jan 10 00:45:15 2015 -0300

    Update Inherited Role Assignment Extension section

    This patch updates the section which explains
    inherited role assignments in order to include
    information about role inheritance in a project
    hierarchy.

    Closes-Bug: #1409205
    Change-Id: Ie3d8e1f16ee0b65b4886ae8e7866deb558238702