Updated openstack/openstack
Project: openstack/nova  3ba1064dca65154813568c0232a6540469863695

Add test cases for block_device

There is no test for function new_format_is_swap and
new_format_is_ephemeral in block_device, this patch add test
cases for the 2 functions.

Change-Id: I86abafca5cb48e92574aec95d5e8c914efef2a45