Volume boot test uses new block device syntax

This patch adds a new test that tests the volume boot with the new block
device mapping syntax that was added to Nova in Havana.

For more details on the v2 block device mapping syntax see the following
Wiki page: https://wiki.openstack.org/wiki/BlockDeviceConfig

Change-Id: Ie15d62fded79dd19e896f6317123597f70ed3f6e
1 file changed