mifosx-567 ensure duplicate externalId for staff and loan general valid json error response

mifosng-provider/src/main/java/org/mifosplatform/organisation/staff/service/StaffWritePlatformServiceJpaRepositoryImpl.java

@@ -98,7 +98,7 @@ public class StaffWritePlatformServiceJpaRepositoryImpl implements StaffWritePla
             }
 
             if (!changesOnly.isEmpty()) {
-                this.staffRepository.save(staffForUpdate);
+                this.staffRepository.saveAndFlush(staffForUpdate);
             }
 
             return new CommandProcessingResultBuilder().withCommandId(command.commandId()).withEntityId(staffId)

mifosng-provider/src/main/java/org/mifosplatform/portfolio/loanaccount/service/LoanApplicationWritePlatformServiceJpaRepositoryImpl.java

@@ -140,6 +140,7 @@ public class LoanApplicationWritePlatformServiceJpaRepositoryImpl implements Loa
     @Override
     public CommandProcessingResult submitApplication(final JsonCommand command) {
 
+        try {
         final AppUser currentUser = context.authenticatedUser();
 
         this.fromApiJsonDeserializer.validateForCreate(command.json());
@@ -201,6 +202,10 @@ public class LoanApplicationWritePlatformServiceJpaRepositoryImpl implements Loa
                 .withGroupId(newLoanApplication.getGroupId()) //
                 .withLoanId(newLoanApplication.getId()) //
                 .build();
+        } catch (DataIntegrityViolationException dve) {
+            handleDataIntegrityIssues(command, dve);
+            return CommandProcessingResult.empty();
+        }
     }
     
     @Transactional