Change log for AZURE_AD_AUDIT

Date Changes
2022-06-20 Enhancement - Enhanced the parser to parse the logs with category : 'AuditLogs' and 'SignInLogs' by adding following mappings :
- Mapped the field 'properties.id' to 'metadata.product_log_id'.
- Mapped the field 'properties.loggedByService' to 'target.application'.
- Mapped the field 'Level' to 'security_result.severity' and 'security_result.severity_details'.
- Mapped the field 'properties.result' to 'security_result.summary' and 'security_result.action'.
- Mapped the field 'properties.operationType' to 'security_result.action_details'.
- Mapped the field 'properties.activityDisplayName' to 'metadata.description'.
- Mapped the field 'properties.category' to 'metadata.product_event_type'.
- Mapped the field 'properties.resultReason' to 'security_result.description'.
- Mapped the field 'properties.initiatedBy.app.displayName' to 'principal.application'.
- Mapped the field 'properties.ipAddress' to 'principal.ip'.
- Mapped the field 'properties.initiatedBy.app.servicePrincipalId' to 'principal.user.userid'.
- Mapped the field 'properties.initiatedBy.app.servicePrincipalName' to 'principal.user.user_display_name'.
- Mapped the field 'properties.appId' and 'properties.initiatedBy.app.appId' to 'principal.resource.attribute.labels'.
- Mapped the field 'properties.location.city' to 'principal.location.city'.
- Mapped the field 'properties.location.state' to 'principal.location.state'.
- Mapped the field 'properties.location.countryOrRegion' to 'principal.location.country_or_region'.
- Mapped the field 'properties.location.geoCoordinates.latitude' to 'principal.location.region_latitude'.
- Mapped the field 'properties.location.geoCoordinates.longitude' to 'principal.location.region_longitude'.
- Mapped the fields 'properties.targetResources.modifiedProperties' to 'target.user.attribute.labels'.
- Mapped the field 'targetResources.displayName' to 'target.user.user_display_name'.
- Mapped the field 'targetResources.id' to 'target.user.userid'.
- Mapped the fields 'properties.additionalDetails', 'properties.riskDetail', 'properties.riskEventTypes', 'properties.riskEventTypes_v2', 'properties.riskLevelAggregated', 'properties.riskLevelDuringSignIn', 'properties.riskState', 'properties.conditionalAccessStatus', 'tenantId' to 'additional.fields'.
- Mapped the field 'operationVersion' to 'metadata.product_version'.
- Mapped the field 'properties.appliedConditionalAccessPolicies.displayName' to 'about.user.user_display_name'.
- Mapped the field 'properties.appliedConditionalAccessPolicies..id' to 'about.user.userid'.
- Mapped the field 'properties.appliedConditionalAccessPolicies.result' to 'about.labels'.