Code review comment for lp:~rconradharris/nova/lp794672

Sorry. Couple more thoughts here.

Do we want to maintain backwards compatibility with the old glance_host/glance_port flags as well? I mean if a user specifies only the glance_host/glance_port options we could use that. Otherwise if the new glance_api_servers is specified we could use it instead of the legacy flags.