mds: remove dir from 'new' list on any commit, not just on clean
mds: remove dir from 'new' list on any commit, not just on clean

A dir may be redirtied after the commit, such that it never becomes clean.
It only needs to stay on the 'new' list until it's been written to disk
at least once, though.

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