Keystone token authentication with glance-replicator produces 401 error

Issue

After setting up glance-replicator to replicate images across WAN deployments, authentication with keystonrc on each Glance node and the running of Glance operations was successful. However, authenticating glance-replicator with tokens returns 401 Not Authorized errors, as follows:

~(keystone_glance)]$ glance-replicator livecopy <IP> <IP> -v -d -t=$TOKEN
<etc>
Response: 401 Unauthorized {'date': '<date>', 'content-length': '253', 'content-type': 'text/plain; charset=UTF-8'}
Traceback (most recent call last):
  File "/usr/bin/glance-replicator", line 10, in <module>
    sys.exit(main())
  File "/usr/lib/python2.7/site-packages/glance/cmd/replicator.py", line 807, in main
    command(options, args)
  File "/usr/lib/python2.7/site-packages/glance/cmd/replicator.py", line 514, in replication_livecopy
    for image in master_client.get_images():
  File "/usr/lib/python2.7/site-packages/glance/cmd/replicator.py", line 155, in get_images
    response = self._http_request('GET', url, {}, '')
  File "/usr/lib/python2.7/site-packages/glance/cmd/replicator.py", line 129, in _http_request
    raise AuthenticationException(response.read())
glance.cmd.replicator.AuthenticationException: 401 Unauthorized

This server could not verify that you are authorized to access the document you requested. Either you supplied the wrong credentials (e.g., bad password), or your browser does not understand how to supply the credentials required.