The 404 fallbacks should be removed from PUT and POST operations in the OpenStack APIs

Write operations such as PUT or POST should not use the 404 fallbacks that silently return null instead of propagating an exception. The fallback should be removed so a ResourceNotFoundException is propagated.
See the discussion here: https://github.com/jclouds/jclouds-labs-openstack/pull/135/files#r16700137