kclient: EBADF if there are no caps on an inode
kclient: EBADF if there are no caps on an inode

This will unwedge processes waiting on RD or WR when the mds
caps go away for some reason (like a partial or failed
reconnect).

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