FINERACT-2181: Fix fully paid check on EmiModel

fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/api/LoanTransactionsApiResourceSwagger.java

@@ -108,6 +108,8 @@ final class LoanTransactionsApiResourceSwagger {
         public List<GetLoanProductsChargeOffReasonOptions> chargeOffReasonOptions;
 
         public List<GetPaymentTypeOptions> paymentTypeOptions;
+        @Schema(example = "200.000000")
+        public Double netDisbursalAmount;
     }
 
     public static final class GetLoanCurrency {

fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/LoanRepaymentScheduleInstallment.java

@@ -30,6 +30,7 @@ import java.math.BigDecimal;
 import java.time.LocalDate;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Objects;
 import java.util.Set;
 import lombok.Getter;
 import lombok.Setter;
@@ -1025,7 +1026,7 @@ public class LoanRepaymentScheduleInstallment extends AbstractAuditableWithUTCDa
     }
 
     public void copyFrom(final LoanRepaymentScheduleInstallment installment) {
-        if (getId().equals(installment.getId())) {
+        if (nonNullAndEqual(getId(), installment.getId())) {
             return;
         }
         // Reset balances
@@ -1149,4 +1150,8 @@ public class LoanRepaymentScheduleInstallment extends AbstractAuditableWithUTCDa
         }
         setLoanTransactionToRepaymentScheduleMappings(retainedTransactionRepaymentScheduleMapping);
     }
+
+    private static boolean nonNullAndEqual(Object a, Object b) {
+        return a != null && b != null && Objects.equals(a, b);
+    }
 }