Change log for SYMANTEC_WEB_ISOLATION

Date Changes
2022-07-08 Enhancement:
- Modified mapping for "device.user.organization.id" from "target.user.groupid" to "target.user.group_identifiers".
- Modified mapping for "device.user.organization.name" from "target.user.group_identifiers" to "target.user.department".
2022-06-20 Enhancement - Changed UDM field name from "metada.product_name" to "metadata.product_name".
Added conditional checks for fields "original_source_ip", "url_host" and "destination_ip".
Dropped the logs having invalid JSON format.