Updated openstack/openstack
Project: openstack/nova  191aca02a20a0b49cb3931e41e26417f72f4618e

Add EC2InstanceMapping object for use in EC2

The EC2 code has a table mapping instance UUIDs to EC2 IDs.  This patch
creates the Nova object for this so that we can remove direct use of
these db.api calls from the EC2 code.

Change-Id: Ib55426de29c1290ff9c7bcb999fb3b3124521750