Updated openstack/openstack
Project: openstack/nova  3b58ab43f5fd9bb4f219eef8fa80de5ae72f16e1

initialize objects with context in compute api

These changes aim to clean up the pattern of passing a context in
object member functions create/destroy/refresh/save and instead
initialize the object with the context when it's constructed.

Related to blueprint kilo-objects

Change-Id: I3781bd5fb7de0ff578ea4342be5cb68eef52c43d