ConnectionError when tries to create HTTPClient connection

[Abhishek Kekane]

When trying to create HTTPClient connection using keystone /v3 it raises ConnectionError.

# use v3 auth with http://controller:5000/v3
>>> from cinderclient.v3 import client
>>> nt = client.Client(USERNAME, PASSWORD, PROJECT_ID, AUTH_URL)
>>> nt.volumes.list()

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "cinderclient/v2/volumes.py", line 300, in list
    return self._list(url, resource_type, limit=limit)
  File "cinderclient/base.py", line 84, in _list
    resp, body = self.api.client.get(url)
  File "cinderclient/client.py", line 429, in get
    return self._cs_request(url, 'GET', **kwargs)
  File "cinderclient/client.py", line 378, in _cs_request
    self.authenticate()
  File "cinderclient/client.py", line 542, in authenticate
    auth_url = self._v2_or_v3_auth(auth_url)
  File "cinderclient/client.py", line 625, in _v2_or_v3_auth
    self._authenticate(url, body)
  File "cinderclient/client.py", line 638, in _authenticate
    allow_redirects=True)
  File "cinderclient/client.py", line 356, in request
    **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 58, in request
    return session.request(method=method, url=url, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 518, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 639, in send
    r = adapter.send(request, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/requests/adapters.py", line 502, in send
    raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='10.232.48.201', port=5000): Max retries exceeded with url: /v3/auth/tokens (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x7f12a536b210>: Failed to establish a new connection: [Errno 111] Connection refused',))