Updated openstack/openstack
Project: openstack/nova  023005139a885b8aaf9e9c672e79654fc3fa726c

Format eph disk with  specified format in libvirt

novaclient has following command parameters:
--ephemeral size=<size>[,format=<format>]
Create and attach a local ephemeral block device of
<size> GB and format it to <format>.

so mkfs should use the specified format instead of using
default format.

Change-Id: I7a8753284d7b1da1a1203e85b430bd0c5012937a
Closes-Bug: #1280132