Non-unique operationIds in swagger.json result in '_1' appended

@SpringBootApplication
public class DemoApplication {

    @Autowired
    private SampleService sampleService;

    @Autowired
    private SampleServiceInternal sampleServiceInternal;

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

    @Bean(destroyMethod = "shutdown")
    public SpringBus cxf() {
        return new SpringBus();
    }

    @Bean(destroyMethod = "destroy")
    @DependsOn("cxf")
    public Server jaxRsServer() {
        final JAXRSServerFactoryBean factory = new JAXRSServerFactoryBean();
        factory.setServiceBeans(Arrays.asList(sampleService, sampleServiceInternal));
        factory.setBus(cxf());
        factory.setAddress("/");
        factory.setFeatures(Arrays.asList(configureSwagger()));
        return factory.create();
    }

    private Swagger2Feature configureSwagger() {
        Swagger2Feature feature = new Swagger2Feature();
        feature.setBasePath("/");
        return feature;
    }

}

// 20171114155626
// http://localhost:17070/services/swagger.json
{
  "swagger": "2.0",
  "info": {
    "description": "The Application",
    "version": "1.0.0",
    "title": "Sample REST Application",
    "contact": {
      "name": "users@cxf.apache.org"
    },
    "license": {
      "name": "Apache 2.0 License",
      "url": "http://www.apache.org/licenses/LICENSE-2.0.html"
    }
  },
  "basePath": "/services",
  "tags": Array[2][
    {
      "name": "internal"
    },
    {
      "name": "test"
    }
  ],
  "paths": {
    "/Internal/internal": {
      "get": {
        "tags": Array[1][
          "internal"
        ],
        "operationId": "getInternal_1",
        "parameters": Array[0][
          
        ],
        "responses": {
          "200": {
            "description": "successful operation",
            "schema": {
              "type": "string"
            },
            "headers": {
              
            }
          }
        }
      }
    },
    "/test/test": {
      "get": {
        "tags": Array[1][
          "test"
        ],
        "operationId": "getTest_1",
        "parameters": Array[0][
          
        ],
        "responses": {
          "200": {
            "description": "successful operation",
            "schema": {
              "type": "string"
            },
            "headers": {
              
            }
          }
        }
      }
    }
  }
}

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.5.8.RELEASE)

2017-11-14 16:25:11.655  INFO 69492 --- [           main] reproduce.bug.demo.DemoApplication       : Starting DemoApplication on daniyars-mbp.usny.ibm.com with PID 69492 (/Users/Daniyar.Yeralin/Repositories/demo/out/production/classes started by Daniyar.Yeralin in /Users/Daniyar.Yeralin/Repositories/demo)
2017-11-14 16:25:11.657  INFO 69492 --- [           main] reproduce.bug.demo.DemoApplication       : The following profiles are active: reactive
2017-11-14 16:25:11.714  INFO 69492 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@6af93788: startup date [Tue Nov 14 16:25:11 EST 2017]; root of context hierarchy
2017-11-14 16:25:12.893  INFO 69492 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 17070 (http)
2017-11-14 16:25:12.906  INFO 69492 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2017-11-14 16:25:12.907  INFO 69492 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.23
2017-11-14 16:25:13.001  INFO 69492 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2017-11-14 16:25:13.002  INFO 69492 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1292 ms
2017-11-14 16:25:13.286  INFO 69492 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]
2017-11-14 16:25:13.289  INFO 69492 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'CXFServlet' to [/services/*]
2017-11-14 16:25:13.291  INFO 69492 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2017-11-14 16:25:13.291  INFO 69492 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2017-11-14 16:25:13.291  INFO 69492 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2017-11-14 16:25:13.291  INFO 69492 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2017-11-14 16:25:13.448  INFO 69492 --- [           main] org.apache.cxf.endpoint.ServerImpl       : Setting the server's publish address to be /
2017-11-14 16:25:13.693  INFO 69492 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@6af93788: startup date [Tue Nov 14 16:25:11 EST 2017]; root of context hierarchy
2017-11-14 16:25:13.741  INFO 69492 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2017-11-14 16:25:13.742  INFO 69492 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2017-11-14 16:25:13.761  INFO 69492 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-11-14 16:25:13.762  INFO 69492 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-11-14 16:25:13.785  INFO 69492 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-11-14 16:25:13.887  INFO 69492 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2017-11-14 16:25:13.946  INFO 69492 --- [           main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 17070 (http)
2017-11-14 16:25:13.951  INFO 69492 --- [           main] reproduce.bug.demo.DemoApplication       : Started DemoApplication in 2.663 seconds (JVM running for 3.025)