Bug fixes

fix: nova-network utilizing wrong osops public interface b2ce2eee04cf1c6319d0ecf68f112ad87b673c1e

fix: chef bootstrap prompting password 6cc28432108999da5cbf4de4c847732feb25864e

add: option to control deletion of default nova flavors 1edce79806bc48e7328a008de01e5f8224ef38fc