add project id to initiator data for auditing

[Steve Martinelli]

as seen below, for a CADF notification, the initiator data contains the user id

"initiator": {
            "typeURI": "service/security/account/user",
            "host": {
                "agent": "curl/7.22.0(x86_64-pc-linux-gnu)",
                "address": "127.0.0.1"
            },
            "id": "c9f76d3c31e142af9291de2935bde98a"
        },

It would also be helpful to add the id of the scope (project or domain) that the user performed the operation on.

I'm not sure what the best way to represent this data is, but it seems relevant to add.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/162547

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/162547
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=fb838489a4c258f3ad6aebb7e232cdf7b0541022
Submitter: Jenkins
Branch: master

commit fb838489a4c258f3ad6aebb7e232cdf7b0541022
Author: Steve Martinelli <email address hidden>
Date: Mon Mar 9 02:48:58 2015 -0400

    Add scope info to initiator data for CADF notifications

    the project id (or domain id) is important information to audit,
    as such, it should be added to the initiator block of a CADF
    notification.

    Change-Id: I7d73f671130485e449820d7f6d38a25c3bbc05bf
    Closes-Bug: 1428945