- Fix the mdc_replay_open fixup so that it updates the handle in the Lustre

- Fix the mdc_replay_open fixup so that it updates the handle in the Lustre
  fh, not just in the request.
- Diagnostic for close-releasing-open req balancing.
- Don't allocate new transnos for replayed requests, or all hell _does_ break
  loose with the committing of "old" requests as things get renumbered.
- Set request level to LUSTRE_CONN_RECOVD during replay.
- Only call the replay callback if the replay succeeded (which it had darned
  well better do, but still...)
- Unlink old MEs when we free old reply buffers -- very important, sigh.
- Bullet-proof some resend diagnostics.