fix order dependent test

`ReflectionTest` uses column information in tests and those tests break
if tests are run in random order.

activerecord/test/cases/transactions_test.rb

@@ -453,6 +453,11 @@ def test_sqlite_add_column_in_transaction
         raise ActiveRecord::Rollback
       end
     end
+
+   ensure
+    Topic.reset_column_information # reset the column information to get correct reading
+    Topic.connection.remove_column('topics', 'stuff') if Topic.column_names.include?('stuff')
+    Topic.reset_column_information # reset the column information again for other tests
   end
 
   def test_transactions_state_from_rollback