Updated openstack/openstack
Project: openstack/python-cinderclient  a6b434ee0576a3eadd507cdc1205a82d27796eac

cinderclient does not retry with TimeoutException

Added retry support when encounter requests.exceptions.Timeout
during HTTP request.

Closes-Bug: #1379505

Change-Id: I6253a109c3a76dd2f15c96a349da68936f9bfff4