ceph.conf: separate replicas across osds
ceph.conf: separate replicas across osds

ceph.git master now separates across crush hosts without this setting.
For teuthology clusters, we don't want that (unless the tests specifies
otherwise).

dmick/teuthology,caibo2014/teuthology,zhouyuan/teuthology,tchaikov/teuthology,t-miyamae/teuthology,tchaikov/teuthology,SUSE/teuthology,SUSE/teuthology,ceph/teuthology,yghannam/teuthology,dmick/teuthology,yghannam/teuthology,dmick/teuthology,michaelsevilla/teuthology,ktdreyer/teuthology,ivotron/teuthology,ivotron/teuthology,ktdreyer/teuthology,dreamhost/teuthology,dreamhost/teuthology,ceph/teuthology,robbat2/teuthology,caibo2014/teuthology,t-miyamae/teuthology,SUSE/teuthology,michaelsevilla/teuthology,zhouyuan/teuthology,robbat2/teuthology