mds: do not finish_scatter_gather_update_accounted on dirfraglock
mds: do not finish_scatter_gather_update_accounted on dirfraglock

This needs to match finish_scatter_gather_update, and we don't
update/project the dirfrag there.

Signed-off-by: Sage Weil <6dd34506bbd5e58221bbb3e4732d97c91f02277b@newdream.net>

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