LU-1019 ptlrpc: fix ptlrpcd transfer message

LU-1019 ptlrpc: fix ptlrpcd transfer message

Fix the debug message when transferring requests between ptlrpcd
threads to correctly identify the source and target thread index.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I330deb92a2ae0c9134dbf24ee6074e0cf9803d31
Reviewed-on: http://review.whamcloud.com/2195
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@whamcloud.com>
Reviewed-by: Fan Yong <yong.fan@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>