PLAT-6304 - Simplified portfolio loader tool
PLAT-6304 - Simplified portfolio loader tool

Added in release notes for changes that will be required in client projects

Reviewed-by: Jon

McLeodMoores/starling,DevStreet/FinanceAnalytics,jerome79/OG-Platform,codeaudit/OG-Platform,jerome79/OG-Platform,ChinaQuants/OG-Platform,McLeodMoores/starling,McLeodMoores/starling,nssales/OG-Platform,jeorme/OG-Platform,nssales/OG-Platform,ChinaQuants/OG-Platform,jeorme/OG-Platform,ChinaQuants/OG-Platform,McLeodMoores/starling,DevStreet/FinanceAnalytics,codeaudit/OG-Platform,nssales/OG-Platform,DevStreet/FinanceAnalytics,jeorme/OG-Platform,jeorme/OG-Platform,codeaudit/OG-Platform,nssales/OG-Platform,jerome79/OG-Platform,jerome79/OG-Platform,ChinaQuants/OG-Platform,codeaudit/OG-Platform,DevStreet/FinanceAnalytics