Updated openstack/openstack
Project: openstack/nova  b0f47f4e8593f948b5fd2810acc6aa70f4df929b

Remove uncessary instance.save in nova compute

Adjust the code path to remove an uncessary instance.save
function to make the boot performance better.

Change-Id: I9e9ac85912f026b2953c7b283dd51a704a52164c