#452 data will still be rollbacked after setting setautocommit(true)

[Jira Trac]

Steps:
1. Create CUBRID Connection instance
2. Set autocommit is true
3. Execute create table sql using ExecuteNonQuery()
4. Try to do connection rollback
5. Check table in db

Result:
table is not created, actually, it is rollbacked by conn.Rollback()

Expected result:
if autocommit is true before start transaction, data should not be impacted by rollback operation