- documentation update for MDS recovery

- documentation update for MDS recovery
- remove unused MGR_ constants
- remove rpc fallout from Andreas mergers
- add last committed updates to close/reint
- add handling of last committed to client file system
- add replay handling for recovery to client fs & rpc
- mark requests as completed and committed on the client to
  be agnostic of the ordering of these events
- state machine for recovd - basics in place
- last_committed and last_received moved in the lustre_msg from body
- client cleanup is call when system cleans up
- set transaction numbers properly on MDS
- mds_connect call completed
- obd interface for high availability new connection announcements