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.