uclient: only update inode if version increased
uclient: only update inode if version increased

This realigns the code with the kernel version, fixing a number of
problems when you have multiple MDSs returning info on the same inode.

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

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