LU-13608 tgt: abort recovery while reading update llog

LU-13608 tgt: abort recovery while reading update llog

Abort the reading update LLOG fromt other MDTs when the recovery
is aborted, then the recovery process can be aborted in time.

This patch also adds watchdog for the process of the replay request
to detect possible stale process.

Change-Id: Ie2de041360c9eba95ef9bfd14b00ac2709e6eace
Signed-off-by: Hongchao Zhang <hongchao@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/38746
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Lai Siyao <lai.siyao@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>