swagger-api#1424 forgot to add this test resource file

modules/swagger-jaxrs/src/test/java/io/swagger/resources/SimpleSelfReferencingSubResource.java

@@ -0,0 +1,24 @@
+package io.swagger.resources;
+
+
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+
+@Produces({"application/xml"})
+public class SimpleSelfReferencingSubResource {
+
+    @Path("/sub")
+    public SubResource getSubResource() {
+        return new SubResource();
+    }
+
+    // keep this test resource simple with just a single level of self-reference
+    public static class SubResource {
+        @GET
+        public SubResource getSelf() {
+            return this;
+        }
+    }
+}