Clean up zfs_clone_010_pos

Remove a lot of unnecessary setting and incrementing of `i`.

Remove unused variable `j`.

Instead of calling out to Python in a loop to generate the same string
repeatedly, generate the string once using shell constructs before
entering the loop.

Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com>
Signed-off-by: Ryan Moeller <ryan@ixsystems.com>
Closes #9284

tests/zfs-tests/tests/functional/cli_root/zfs_clone/zfs_clone_010_pos.ksh

@@ -143,7 +143,6 @@ datasets="$TESTPOOL/$TESTFS1 $TESTPOOL/$TESTFS1/$TESTFS2
 typeset -a d_clones
 typeset -a deferred_snaps
 typeset -i i
-i=1
 log_must setup_ds
 
 log_note "Verify zfs clone property for multiple clones"
@@ -157,19 +156,16 @@ for ds in $datasets; do
 	((i=i+1))
 done
 names=$(zfs list -rt all -o name $TESTPOOL)
-i=1
 log_must verify_clones 2 1
 
 log_must local_cleanup
 log_must setup_ds
 
 log_note "verify zfs deferred destroy on clones property"
-i=1
 names=$(zfs list -rt all -o name $TESTPOOL)
 for ds in $datasets; do
 	log_must zfs destroy -d $ds@snap
 	deferred_snaps=( "${deferred_snaps[@]}" "$ds@snap" )
-	((i=i+1))
 done
 log_must verify_clones 3 0
 
@@ -206,28 +202,23 @@ for ds in $datasets; do
 done
 names=$(zfs list -rt all -o name,clones $TESTPOOL)
 log_must verify_clones 3 1 $TESTCLONE
-i=1
 for ds in $datasets; do
 	log_must zfs promote $ds
-	((i=i+1))
 done
 log_must local_cleanup
 
 log_note "verify clone list truncated correctly"
-typeset -i j=200
-i=1
 fs=$TESTPOOL/$TESTFS1
+xs=""; for i in {1..200}; do xs+="x"; done
 if is_linux; then
 	ZFS_MAXPROPLEN=4096
 else
 	ZFS_MAXPROPLEN=1024
 fi
 log_must zfs create $fs
 log_must zfs snapshot $fs@snap
-while((i <= $(( ZFS_MAXPROPLEN/200+1 )))); do
-	log_must zfs clone $fs@snap $fs/$TESTCLONE$(python -c 'print "x" * 200').$i
-	((i=i+1))
-	((j=j+200))
+for (( i = 1; i <= (ZFS_MAXPROPLEN / 200 + 1); i++ )); do
+	log_must zfs clone ${fs}@snap ${fs}/${TESTCLONE}${xs}.${i}
 done
 clone_list=$(zfs list -o clones $fs@snap)
 char_count=$(echo "$clone_list" | tail -1 | wc | awk '{print $3}')