Change log for ARUBA_EDGECONNECT_SDWAN

Date Changes
2024-06-10 Enhancement:
- Added a Grok pattern to parse the new pattern of SYSLOG format logs.
- Mapped "summary" to "security_result.summary".
- Mapped "userid" to "principal.user.userid".
- Mapped "hostname" to "target.hostname" and "target.asset.hostname".
- Mapped "command" to "principal.process.command_line".
- Mapped "principal_ip" to "principal.asset.ip" and "principal.asset.ip".
- When "userid", "hostname" are present, and "description" is nearly equal to "login", then set "metadata.event_type" to "USER_LOGIN".
- When "principal_present" is true, then set "metadata.event_type" to "STATUS_UPDATE".
2023-05-03 Newly created parser.