LU-9274 ptlrpc: add replay request into unreplied list

LU-9274 ptlrpc: add replay request into unreplied list

ptlrpc_prepare_replay() may fail to add replay request into unreplied
list if the request hasn't been on replay list yet, so in
ptlrpc_replay_next() before sending replay, we'd always make sure the
replay request is on unreplied list.

Signed-off-by: Niu Yawei <yawei.niu@intel.com>
Change-Id: I91757cd4fde1d85d146475e078db125acc2c821f
Reviewed-on: https://review.whamcloud.com/27920
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Yang Sheng <yang.sheng@intel.com>
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>