added test for renaming and reordering same column

localtests/rename-reorder-column/create.sql

@@ -0,0 +1,26 @@
+drop table if exists gh_ost_test;
+create table gh_ost_test (
+  id int auto_increment,
+  c1 int not null,
+  c2 int not null,
+  primary key (id)
+) auto_increment=1;
+
+drop event if exists gh_ost_test;
+delimiter ;;
+create event gh_ost_test
+  on schedule every 1 second
+  starts current_timestamp
+  ends current_timestamp + interval 60 second
+  on completion not preserve
+  enable
+  do
+begin
+  insert ignore into gh_ost_test values (1, 11, 23);
+  insert ignore into gh_ost_test values (2, 13, 23);
+  insert into gh_ost_test values (null, 17, 23);
+  set @last_insert_id := last_insert_id();
+  update gh_ost_test set c1=c1+@last_insert_id, c2=c2+@last_insert_id where id=@last_insert_id order by id desc limit 1;
+  delete from gh_ost_test where id=1;
+  delete from gh_ost_test where c1=13; -- id=2
+end ;;

localtests/rename-reorder-column/extra_args

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+--alter="change column c2 c2a int not null after id" --approve-renamed-columns

localtests/rename-reorder-column/ghost_columns

@@ -0,0 +1 @@
+id, c1, c2a

localtests/rename-reorder-column/orig_columns

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+id, c1, c2