Added OpenAPI fail check

Author: xch4ngecom

src/main/java/in/erail/route/OpenAPI3RouteBuilder.java

@@ -247,6 +247,13 @@ public Router getRouter(Router pRouter) {
                             process(routingContext, service.getServiceUniqueId());
                           }
                         });
+                        
+                        apiFactory.addFailureHandlerByOperationId(service.getOperationId(),(routingContext) -> {
+                            routingContext
+                                .response()
+                                .setStatusCode(400)
+                                .end(routingContext.failure().toString());
+                        });
                       });
             });