Updated openstack/openstack
Project: openstack/nova  7b36bf0459fc460099850700dc28df5b440a11ce

ec2: create volume mapping using nova object

Update the EC2 code that creates a mapping in the db between the
volume UUID and an EC2 ID to use the nova object for this.

Change-Id: I2b02c9f639519a7835ffcf27be704b4810334e6d