Change log for OPENLDAP

Date Changes
2023-07-18 Enhancement:
- Added a Grok pattern to parse failing logs.
2022-08-17 Enhancement:
- Handled the dropped logs due to grak failure and mapped them to valid event_types.
- Mapped "metadata.event_type" to "STATUS_UPDATE" where "principal.hostname" is not null else mapped it as "GENERIC_EVENT".