User role deletion is broken

[Unmesh Gurjar]

Scenario: Using the Keystone Admin API, delete a user's role.
sample API call: DELETE v2.0/users/{user_id}/roles/OS-KSADM/{role_id}

Branch: master

Expected Result: API should return 501 (Not Implemented) response (since the idea of user-only roles is expected to die off).

Actual Result: API returns 500 Internal Server Error.

Stack trace: Following is the stack trace:
  File "/usr/lib/python2.7/dist-packages/webob/dec.py", line 208, in call_func
    return self.func(req, *args, **kwargs)
  File "/opt/stack/keystone/keystone/common/wsgi.py", line 199, in __call__
    method = getattr(self, action)
AttributeError: 'RoleController' object has no attribute 'delete_role_from_user'

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/9259

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/9259
Committed: http://github.com/openstack/keystone/commit/94481ab3fddc106438bdcaded85992700ebdf121
Submitter: Jenkins
Branch: master

commit 94481ab3fddc106438bdcaded85992700ebdf121
Author: Unmesh Gurjar <email address hidden>
Date: Tue Jul 3 10:27:58 2012 +0530

    Fixed user-only role deletion error.

    Fixed the error on deleting a user-only role to return a 501 error response.
    Fixes bug 1020109.

    Change-Id: I7ff4d0c29bb7665468d9109c86a360148cff9214