Change log for CISCO_SWITCH

Date Changes
2022-07-21 Enhancement
- Added grok pattern and enhanced the parser to parse the logs that were getting dropped (logs without "%--).
- Mapped 'hostname' to 'principal.hostname'
- Mapped 'source_ip' to 'principal.ip'
- Mapped 'destination_ip' to 'target.ip'
- Mapped 'ip_protocol' to 'network.ip_protocol'.
- Mapped 'summary' to 'security_result.summary'.
- Mapped 'header_data' to 'metadata.product_log_id'.