return new geographic site in case there in not one

src/main/java/org/etsi/osl/tmf/gsm674/api/GeographicSiteManagementApiController.java

@@ -65,6 +65,7 @@ public class GeographicSiteManagementApiController implements GeographicSiteMana
                 Individual ind = individualRepoService.findByUsername(principal.getName());
 
                 GeographicSite gs= geographicSiteManagementService.findGeographicSiteByRelatedPartyId(ind.getId());
+                if (gs==null) gs =new GeographicSite();
                 return new ResponseEntity<GeographicSite>(gs,HttpStatus.OK);
 
             } else if ( authentication.getAuthorities().contains( new SimpleGrantedAuthority( UserRoleType.ROLE_ADMIN.getValue()  ) ) ){