uclient: only try to update caps on the auth MDS.
uclient: only try to update caps on the auth MDS.

Previously we would send updates on things like the max_size we
wanted to the first MDS in our list, which was bad if the auth mds
had a higher number. Now, only send them (and update bookkeeping)
for the auth MDS.

Signed-off-by: Greg Farnum <0bcb4295d38ee745130ea5f2bb88ef4eef474e61@dreamhost.com>

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