Updated openstack/openstack
Project: openstack/nova  218e7139f57b72f25c9b58f0c28c07128ea307e8
null
Prevent caller from specifying id during Service.create()

The patch is to remove id when it was set before creating a service
in objects, and check if the service exists before it is created.

Related to blueprint icehouse-objects.

Change-Id: I688bfc98234f4bc27fb15474e05c7f25753efaf7