mds: turn off mds_bal_frag until resolve vs split/merge is fixed
mds: turn off mds_bal_frag until resolve vs split/merge is fixed

See #594

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

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