test: adjust unstable case

tests/script/tsim/mnode/basic5.sim

@@ -206,7 +206,6 @@ endi
 
 print =============== step8: stop mnode1 and drop it
 system sh/exec.sh -n dnode1 -s stop -x SIGKILL
-sql_error drop mnode on dnode 1
 
 $x = 0
 step81: 
@@ -234,42 +233,100 @@ if  $leaderNum != 1 then
 endi
 
 print =============== step9: start mnode1 and wait it dropped
-system sh/exec.sh -n dnode1 -s start
-sql drop mnode on dnode 1 -x step90
-step90:
+print check mnode has leader step9a
+$x = 0
+step9a: 
+	$x = $x + 1
+	sleep 1000
+	if $x == 10 then
+		return -1
+	endi
+print check mnode leader
+sql select * from information_schema.ins_mnodes
+print ===> $data00 $data01 $data02 $data03 $data04 $data05
+print ===> $data10 $data11 $data12 $data13 $data14 $data15
+print ===> $data20 $data21 $data22 $data23 $data24 $data25
+$leaderNum = 0
+if $data(1)[2] == leader then
+  $leaderNum = 1
+endi
+if $data(2)[2] == leader then
+  $leaderNum = 1
+endi
+if $data(3)[2] == leader then
+  $leaderNum = 1
+endi
+if  $leaderNum != 1 then
+  goto step9a
+endi
 
+print start dnode1 step9b
+system sh/exec.sh -n dnode1 -s start
 $x = 0
-step91: 
+step9b: 
 	$x = $x + 1
 	sleep 1000
 	if $x == 10 then
 		return -1
 	endi
+print check dnode1 ready	
 sql select * from information_schema.ins_dnodes
 print ===> $data00 $data01 $data02 $data03 $data04 $data05
 print ===> $data10 $data11 $data12 $data13 $data14 $data15
 print ===> $data20 $data21 $data22 $data23 $data24 $data25
 print ===> $data30 $data31 $data32 $data33 $data34 $data35
 if $data(1)[4] != ready then
-  goto step91
+  goto step9b
 endi
 if $data(2)[4] != ready then
-  goto step91
+  goto step9b
 endi
 if $data(3)[4] != ready then
-  goto step91
+  goto step9b
 endi
 if $data(4)[4] != ready then
-  goto step91
+  goto step9b
 endi
 
+sleep 4000
+print check mnode has leader step9c
+$x = 0
+step9c: 
+	$x = $x + 1
+	sleep 1000
+	if $x == 10 then
+		return -1
+	endi
+print check mnode leader
+sql select * from information_schema.ins_mnodes
+print ===> $data00 $data01 $data02 $data03 $data04 $data05
+print ===> $data10 $data11 $data12 $data13 $data14 $data15
+print ===> $data20 $data21 $data22 $data23 $data24 $data25
+$leaderNum = 0
+if $data(1)[2] == leader then
+  $leaderNum = 1
+endi
+if $data(2)[2] == leader then
+  $leaderNum = 1
+endi
+if $data(3)[2] == leader then
+  $leaderNum = 1
+endi
+if  $leaderNum != 1 then
+  goto step9c
+endi
+
+print drop mnode step9d
+sql drop mnode on dnode 1 
+
 $x = 0
-step92: 
+step9d: 
 	$x = $x + 1
 	sleep 1000
 	if $x == 20 then
 		return -1
 	endi
+print check mnode leader
 sql select * from information_schema.ins_mnodes
 print ===> $data00 $data01 $data02 $data03 $data04 $data05
 print ===> $data10 $data11 $data12 $data13 $data14 $data15
@@ -285,10 +342,10 @@ if $data(3)[2] == leader then
   $leaderNum = 1
 endi
 if  $leaderNum != 1 then
-  goto step92
+  goto step9d
 endi
 if $rows != 2 then
-  goto step92
+  goto step9d
 endi
 
 print =============== stepa: create mnode1 again