mds: locking. remove zero-valued client held/waiting lock counts from the map.
mds: locking. remove zero-valued client held/waiting lock counts from the map.

In the unlikely event that you have a very large cluster doing a lot of
locking of different files amongst the whole cluster, this will keep
memory use down.

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