Change log for SYMANTEC_VIP

Date Changes
2023-03-03 Enhancement- Mapped userid to target.user.userid for the logs that were not parsed already.
- Mapped event_type to USER_LOGIN for the logs where userid is present
else if principal.hostname is present then mapped event_type to STATUS_UPDATE,
else mapped it to GENERIC_EVENT.
- Parsed the logs that were dropped initially.
2022-08-03 BugFix - Added the grok pattern to handle the unparsed logs having log_type remove_credentials.