ceph_manager: try both new and old tell mon.* syntax
ceph_manager: try both new and old tell mon.* syntax

So we can test old code with new teuthology (e.g., upgrade testing)

Signed-off-by: Sage Weil <6dd34506bbd5e58221bbb3e4732d97c91f02277b@inktank.com>

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