Updated openstack/openstack
Project: openstack/nova  0b0287963ec2bb32fa91cb58cdd229a96a948f5e
null
Document when config options were deprecated

When going through the code and looking for what code was deprecated and
when, its easier to know if there is an explicit comment. Otherwise one
has to trace through 'git log' and 'git blame' to be 100% sure that its
ok to remove the code.

Change-Id: I57b5861e57168c44729934757e732de962f3d91a