Business Layer finBankingDetails; IsValid() can now return validation errors in an ISValidationItems object

finBankingDetails.IsValid() function now supports an additional overload whereby an ISValidationItems object can be returned which provides all the reasons the validation has failed for the Banking Details.

When using the new overload, any warnings will not be written as a system error (as the original IsValid() function did); they will only be available in the returned ISValidationItems object.

The original overload to the function is unchanged and will set the error as it did.