http://jira.cubrid.org/browse/CBRD-23903

All kinds of queries to count # of rows are gathered into list_file.tuple_count
1) list_file->tuple_cnt is changed to INT64
- db_query_count(), db_query_seek_tuple(), insert/delete/update routines in execute_statement.c take list_file->tuple_cnt value. therefore they are changed.
- packing/unpacking at object_representation.c is changed. (aligning is considered)
2) stats that counting # of rows/keys in scan_stats are changed to print correctly for `;trace on`

• Commit 641734a
• Compare cf18266..641734a
• Branch feature/bigint_count

Hyung-Gyu Ryoo