tests: slow down --stop a bit to allow revert-inplace to work.

revert-inplace would sometimes find that the original reshape had
finished.
So slow down the reshaping during --stop (which needs to be a little
bit fast so that stop doesn't timeout waiting) and don't wait quite
so long before stopping.

Signed-off-by: NeilBrown <neilb@suse.de>

test

@@ -156,7 +156,7 @@ mdadm() {
     case $* in
 	*-S* ) udevadm settle
 	       p=`cat /proc/sys/dev/raid/speed_limit_max`
-	       echo 2000000 > /proc/sys/dev/raid/speed_limit_max
+	       echo 20000 > /proc/sys/dev/raid/speed_limit_max
     esac
     case $* in
 	*-C* ) $mdadm 2> $targetdir/stderr --quiet "$@" --auto=yes;;

tests/07revert-inplace

@@ -8,7 +8,7 @@ mdadm -CR --assume-clean $md0 -l5 -n4 -x1 $devlist4
 check raid5
 testdev $md0 3 $mdsize1 512
 mdadm -G $md0 -l 6
-sleep 3
+sleep 2
 mdadm -S $md0
 mdadm -A $md0 --update=revert-reshape $devlist4 --backup-file=/tmp/md-backup
 check wait
@@ -22,7 +22,7 @@ mdadm -CR --assume-clean $md0 -l6 -n5 $devlist4
 check raid6
 testdev $md0 3 $mdsize1 512
 mdadm -G $md0 -l 5
-sleep 3
+sleep 2
 mdadm -S $md0
 mdadm -A $md0 --update=revert-reshape $devlist4 --backup-file=/tmp/md-backup
 check wait
@@ -35,7 +35,7 @@ mdadm -CR --assume-clean $md0 -l10 -n6 -c 64 $devlist5
 check raid10
 testdev $md0 3 $mdsize1 64
 mdadm -G $md0 -c 32
-sleep 3
+sleep 2
 mdadm -S $md0
 strace -o /tmp/str ./mdadm -A $md0 --update=revert-reshape $devlist5
 check wait