mds: fix protocol versions
mds: fix protocol versions

I screwed this up in a928f767b974cd36f4be6ea618c5cec366d28362.

Signed-off-by: Sage Weil <c5b6ff1fd4f0bde10db63d7a3e07166cf6c4229f@dreamhost.com>

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph