Revert "mds: allow mds to 'exit immediately'"
Revert "mds: allow mds to 'exit immediately'"

This reverts commit c01961ff4b712a12e25e437adceae264273d7428.

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