rbd pool init change breaks standalone tests
as of 819290e5cfefd9ffe2720529bae2924c4b91c07d (i think?) rbd pool init foo now needs rados to be up. a bunch of standalone tests were doing rbd pool init without any osds running and now fail.
see /a/sage-2019-03-05_13:33:11-rados-master-distro-basic-smithi/3671488 for example, or i think most of the failures here: http://pulpito.ceph.com/sage-2019-03-05_03:02:20-rados-wip-sage2-testing-2019-03-04-1033-distro-basic-smithi/