change test dir

tests/script/tsim/tagindex/add_index.sim

+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/exec.sh -n dnode1 -s start
+sql connect
+
+print ======== step0
+$dbPrefix = ta_3_db
+$tbPrefix = ta_3_tb
+$mtPrefix = ta_3_mt
+$tbNum = 1000
+$rowNum = 20
+$totalNum = 200
+
+print =============== create database 
+sql create database $dbPrefix 
+sql use $dbPrefix 
+
+print =============== create super table and register rsma
+sql create table if not exists $mtPrefix (ts timestamp, c1 int) tags (t1 int, t2 int, t3 int, t4 int, t5 int)
+
+sql show stables
+if $rows != 1 then
+  return -1
+endi
+
+print =============== create child table
+
+$i = 0 
+while $i < $tbNum 
+    $tb = $tbPrefix . $i 
+    sql create table $tb using $mtPrefix  tags($i, $i, $i,$i, $i);
+endw
+
+sql show tables
+if $rows != $tbNum then
+  return -1
+endi
+
+
+
+print =============== insert data into each table 
+$i = 0
+while $i < $tbNum
+  $tb = $tbPrefix . $i
+  sql insert into $sb values(now, 10);
+endw
+
+
+sql create index ti2 on $tb(t2)
+//sql create index ti2 on $tb(t3)
+
+
+$i = 0
+while $i < $tbNum
+  sql select * from $mtPrefix where t2=$i;
+  if $rows > 1 then
+    return -1
+  endi
+endw
+
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
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