[CBRD-25337] Fixed an issue where dbname could not be read when an error occurred in loaddb.

[airnet73]

http://jira.cubrid.org/browse/CBRD-25337

Purpose ddl logger sets db name and various information before recording logs. An issue occurred where loaddb crashes if the db name is NULL when an error occurs in loaddb. Modified to shutdown db when loaddb is terminated.

Implementation N/A

Remarks N/A