Change log for FORTINET_FIREWALL

Date Changes
2022-04-29 Enhancement-Added support for action = timeout/close to UDM.
Mapped devname to principal.hostname when principal field is empty.
2022-04-12 Enhancement-Added mappings for new fields.
attackid mapped to security_result.rule_id
crlevel mapped to security_result.severity
incidentserialno mapped to metadata.product_log_id
craction mapped to metadata.product_deployment_id
dstintf mapped to additional.fields
dstintfrole mapped to additional.fields