Updated openstack/openstack
Project: openstack/python-openstackclient  e8f058775eb3dbb9a159218c427d439b3dcc6012

Add support to list volume extensions

Since cinderclient has support to list extensions, we should add
some of the logic to our list extensions command.

Change-Id: I7dc7ca325ea9b82194bba6d875e7b8dc1884d77e
Closes-Bug: #1337687