default policy json is outdated

[Dmitrii Shcherbakov]

"owner" : "user_id:%(user_id)s or user_id:%(target.token.user_id)s", # < -- just a reduntant space between color

# ...
# system-level user-role policy https://review.openstack.org/#/c/514471/7

    "identity:list_system_grants_for_user": "rule:admin_required",
    "identity:check_system_grant_for_user": "rule:admin_required",
    "identity:create_system_grant_for_user": "rule:admin_required",
    "identity:revoke_system_grant_for_user": "rule:admin_required",

https://review.openstack.org/#/c/514725/7/etc/policy.v3cloudsample.json
    "identity:list_system_grants_for_group": "rule:admin_required",
    "identity:check_system_grant_for_group": "rule:admin_required",
    "identity:create_system_grant_for_group": "rule:admin_required",
    "identity:revoke_system_grant_for_group": "rule:admin_required",

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/572727

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/572727
Committed: https://git.openstack.org/cgit/openstack/charm-keystone/commit/?id=24434793165c61bf397c6c9f66f7a70acb117c8e
Submitter: Zuul
Branch: master

commit 24434793165c61bf397c6c9f66f7a70acb117c8e
Author: Frode Nordahl <email address hidden>
Date: Wed Jun 6 12:43:46 2018 +0200

    Update policy.json for Queens

    Source: 166eced28b15335f816134806bf5bb6b50c222cd

    Remove v2 section from template as Queens is v3 only.

    Change-Id: Ic2b1215421ad870096fab7e1aee1f7604c1892a2
    Closes-Bug: #1774716