LU-904 ptlrpc: redo io on -EINPROGRESS

LU-904 ptlrpc: redo io on -EINPROGRESS

When server return -EINPROGRESS for a write RPC, the client
should keep resending the RPC until server return other
error code or the client is evicted.

This is required by the new quota design: when a write on
OST can't acquire quota from master for broken network, it
should return -EINPROGRESS to inform the client to retry
write infinitely.

This patch also fixed the defect of redo io RPC can't be
aborted during eviction, in a lightweight manner.

Signed-off-by: Niu Yawei <niu@whamcloud.com>
Change-Id: Iea393cb1ea55e9d006f52dbfc39a2b9a3670d682
Reviewed-on: http://review.whamcloud.com/1962
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Reviewed-by: Fan Yong <yong.fan@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>