Change log for CS_STREAM

Date Changes
2022-07-18 Enhancement:
- Added following mapping for the LEEF format logs:
- The field "version" mapped to "metadata.product_version".
- The field "usrName" and "userName" to "principal.user.email_addresses" if it is an email else mapped to "principal.user.userid".
- The field "severityName" mapped to "security_result.severity".
- The field "cat" mapped to "security_result.category_details".
- The field "incidentType" mapped to "security_result.summary".
- The field "falconHostLink" mapped to "security_result.about.url".
- The field "numberOfCompromisedEntities" mapped to "security_result.detection_fields[n]".
- The field "identityProtectionIncidentId" mapped to "security_result.detection_fields[n]".
- The field "numbersOfAlerts" mapped to "security_result.detection_fields[n]".
- The field "state" mapped to "security_result.detection_fields[n]".
- Added following mapping for the CEF format logs:
- The field "version" mapped to "metadata.product_version".
- The field "deviceCustomDate1" mapped to "metadata.event_type".
- The field "msg" mapped to "metadata.description".
- The field "cs1" mapped to "security_result.summary" if the value of "cs1Label" is "incidentType" else mapped to "security_result.detection_fields[n]".
- The field "cs2" mapped to "security_result.detection_fields[n]".
- The field "cs3" mapped to "security_result.detection_fields[n]".
- The field "cs1" mapped to "security_result.about.url" if the value of "cs4Label" is "falconHostLink" else mapped to "security_result.detection_fields[n]".
- The field "cn1" mapped to "security_result.detection_fields[n]".
- The field "cn2" mapped to "security_result.detection_fields[n]".
- The field "cn3" mapped to "security_result.detection_fields[n]".
- The field "duser" to "principal.user.email_addresses" if it is an email else mapped to "principal.user.userid".