Updated openstack/openstack
Project: openstack/python-openstackclient  457f4c899845abc1f9fe54fbb694efeeb61313d8

Properly format 'attached to' column list when listing volumes

Previously, no data was being returned for the 'attached to' field
when listing volumes. Dig into the the returned array to format
the column.

Change-Id: Iebd79e5ddcb4a335703d9b2675aa7128995de918
Closes-Bug: #1404931