Change log for PROOFPOINT_TRAP

Date Changes
2023-05-26 Added mapping for the following fields:
- "ewsUrl" mapped to "principal.url".
- "username" mapped to "principal.user.user_display_name".
- "exchangeAuthType","exchangeAPI","tenantId","clientId","clientSecret","graphApiEndpoint","alternateGraphApiEndpoint",
"azureAdAuthEndpoint","privateKey" mapped to "additional.fields".
2022-08-23 Newly Created Parser