LU-1214 ptlrpc: splits server-side connection/bulkIO/recovery

LU-1214 ptlrpc: splits server-side connection/bulkIO/recovery

Splits/removes these server-side handling from client:
1. Server-side connection and disconnection
2. Splits obdecho client and server
3. Server-side bulk I/O
4. Server-side recovery handling

Uses "HAVE_SERVER_SUPPORT" to protect those server-side codes.

Signed-off-by: Liu Xuezhao <xuezhao.liu@emc.com>
Change-Id: I14422a36ffa6fa46604682c9eed6d27dd56a4888
Reviewed-on: http://review.whamcloud.com/2360
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>