Change log for ELASTIC_PACKETBEATS

Date	Changes
2022-05-09	Added mapping for server_name, application, user_id, user_name, level, msg, logger, audit_category, audit_cluster_name, audit_node_id, audit_node_name, audit_request_effective_user, component, uuid.
2022-04-12	Added generic string for Vendor name and replaced different product names to a generic value string.