policy topic document has been out of date

[Wang Bo]

When I tried fix policy related bugs(#1411239) found that horizon/doc/source/topics/policy.rst has been out of date.

We do not use "oslo-incubator" in horizon now.
There is file "openstack_dashboard/openstack/common/policy.py" in hoirzon

Refer to: https://github.com/openstack/horizon/blob/master/doc/source/topics/policy.rst

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/261695

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/261695
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=550fe7748a8581ce07dab5865c8f02ae1e568468
Submitter: Jenkins
Branch: master

commit 550fe7748a8581ce07dab5865c8f02ae1e568468
Author: Bo Wang <email address hidden>
Date: Sat Dec 26 16:51:49 2015 +0800

    Fix policy.rst

    horizon/doc/source/topics/policy.rst has been out of date:
    1."oslo-incubator" is not in using now.
    2."openstack_dashboard/openstack/common/" has been removed
    3.add how to use RBAC in javascript files for ng-panels

    Change-Id: Ia10cf90ec477da56c8e7b1bc4807d177b43183b9
    Close-Bug: #1529007

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/273345

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/273345
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=df2701c524020d1b652a123cb0dea98bc4933b38
Submitter: Jenkins
Branch: master

commit df2701c524020d1b652a123cb0dea98bc4933b38
Author: Bo Wang <email address hidden>
Date: Thu Jan 28 13:55:50 2016 +0800

    Add policy directive into policy.rst

    This commit is as follow-up work of:https://review.openstack.org/#/c/261695/.
    Mention how to use policy directive to complete policy.rst.

    Change-Id: I64e64ba8d7fd0c2e15ffd0f460b9bb981742b4b9
    Partial-Bug: #1529007