S3_token would error out when we have no path

[Chmouel Boudjnah]

stack@devstack:~$ curl http://localhost:8080
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/eventlet/wsgi.py", line 336, in handle_one_response
    result = self.application(self.environ, start_response)
  File "/opt/stack/swift/swift/common/middleware/healthcheck.py", line 38, in __call__
    return self.app(env, start_response)
  File "/opt/stack/swift/swift/common/middleware/memcache.py", line 47, in __call__
    return self.app(env, start_response)
  File "/opt/stack/swift/swift/common/middleware/swift3.py", line 461, in __call__
    return self.app(env, start_response)
  File "/opt/stack/keystone/keystone/middleware/s3_token.py", line 58, in __call__
    parts = swift_utils.split_path(req.path, 1, 4, True)
  File "/opt/stack/swift/swift/common/utils.py", line 232, in split_path
    raise ValueError('Invalid path: %s' % quote(path))
ValueError: Invalid path: /

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/5453

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/5453
Committed: http://github.com/openstack/keystone/commit/7abe0aa3845459b95a7d4e401e51d4ab8c4c0280
Submitter: Jenkins
Branch: master

commit 7abe0aa3845459b95a7d4e401e51d4ab8c4c0280
Author: Chmouel Boudjnah <email address hidden>
Date: Wed Mar 21 16:59:15 2012 +0000

    S3 tokens cleanups.

    - Cleanups.
    - Remove reference about config admin_username/password/token.
    - Return proper http error on errors.
    - Add unittests (skip them for now when swift is not installed).
    - Fixes bug 956983.

    Change-Id: I392fc274f3b01a5a0b5779dd13f9cd3b819ee65a