Change log for JUNIPER_IPS

Date Changes
2022-05-26 Added and modified multiple fields to increase log parsing percentage.
- source-address and internal-ip mapped to principal.ip.
- destination-address and reflexive-ip mapped to target.ip.
- destination-port and reflexive-port target.port.
- source-port and internal-port mapped to principal.port.
- bytes-from-client mapped to received_bytes.
- bytes-from-server mapped to sent_bytes.
- service-name,policy-name mapped to additional.fields.
- devicename mapped to principal.hostname.
- src-nat-rule-name mapped to security_result.rule_name.
- src-nat-rule-type mapped to security_result.rule_type.