admin login in pam backend fails

[Bernhard M. Wiedemann]

when having in keystone.conf
[identity]
driver = keystone.identity.backends.pam.PamIdentity

and using root as user&tenant,
nova list
will fail with
ERROR: An unexpected error prevented the server from fulfilling your request. 'is_admin' (HTTP 500)

and keystone.log shows a backtrace:
  File "/usr/lib64/python2.6/site-packages/keystone/service.py", line 273, in au
thenticate
    tenant_id=tenant_id)
  File "/usr/lib64/python2.6/site-packages/keystone/common/manager.py", line 48,
 in _wrapper
    return f(*args, **kw)
  File "/usr/lib64/python2.6/site-packages/keystone/identity/backends/pam.py", l
ine 66, in authenticate
    metadata['is_admin'] == True
KeyError: 'is_admin'

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/7109

[Bernhard M. Wiedemann (ubuntubmw)]

found that even with the proposed patch, root is not recognized as admin.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/7109
Committed: http://github.com/openstack/keystone/commit/5ad37ebb09e7e7cdd86812c0a5df29599357c2d0
Submitter: Jenkins
Branch: master

commit 5ad37ebb09e7e7cdd86812c0a5df29599357c2d0
Author: Bernhard M. Wiedemann <email address hidden>
Date: Fri May 4 11:13:31 2012 +0200

    fix pam admin user case

    fixes bug 994481

    Change-Id: I4ba73d1ce7ea7bcd6e1d3614230b6bad7ed8e617

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/essex
Review: https://review.openstack.org/7793