[java] Fixing build

Author: diemol

java/test/org/openqa/selenium/grid/node/NodeTest.java

@@ -190,6 +190,11 @@ void shouldCreateASessionIfTheCorrectCapabilitiesArePassedToIt() {
   void shouldRetryIfNoMatchingSlotIsAvailable() {
     Node local = LocalNode.builder(tracer, bus, uri, uri, registrationSecret)
       .add(caps, new SessionFactory() {
+        @Override
+        public Capabilities getStereotype() {
+          return null;
+        }
+
         @Override
         public Either<WebDriverException, ActiveSession> apply(
           CreateSessionRequest createSessionRequest) {