ceph: cleanup/simplify mount/mkfs options
ceph: cleanup/simplify mount/mkfs options

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