add sim test case for bug td-10706

tests/script/general/compute/csum2.sim

@@ -78,7 +78,9 @@ print ===> $data11
 if $data11 != 1.000000000 then 
   return -1
 endi
+
 sql_error select csum(c7) from $tb
+sql_error select csum(c7) from $tb group by c8
 sql_error select csum(c8) from $tb
 sql_error select csum(c9) from $tb
 sql_error select csum(ts) from $tb

tests/script/general/compute/mavg2.sim

@@ -80,6 +80,7 @@ if $data11 != 1.500000000 then
 endi
 sql_error select mavg(c7,2) from $tb
 sql_error select mavg(c8,2) from $tb
+sql_error select mavg(c8,2) from $tb order by c7
 sql_error select mavg(c9,2) from $tb
 sql_error select mavg(ts,2) from $tb
 sql_error select mavg(c1,2), mavg(c2,2) from $tb