Unauthorized exception in angular users page as a member user.

[wei.ying]

Env: devstack master branch

Steps to reproduce:
1. Set 'users_panel' is True in the settings.py
2. Use a member user to login.
3. Go to identity/users panel

It will be redirect to login page when click users panel or click user name to redirect the detail page.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/468726

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/468726
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=dc9a6a33ea5a4b0e92e79252f6a4acf1ef426ec8
Submitter: Zuul
Branch: master

commit dc9a6a33ea5a4b0e92e79252f6a4acf1ef426ec8
Author: wei.ying <email address hidden>
Date: Sun May 28 22:00:38 2017 +0800

    Fix unauthorized exception when using member user to access angular users panel

    When a member role user go to angular users panel, it will be
    raised unauthorized exception since the user has no access to
    get users list. It should be add a policy check mechanism at
    the panel.

    Change-Id: I9cfa1aeab27aca1631322d8c0b3e6a7a930d9cfe
    Closes-Bug: #1694127

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/horizon 14.0.0.0b1 development milestone.