=doc #3689 Make activator templates for camel samples

* @rkuhn found the problems in the scala camel samples
  - HttpSample returns scrambled data
  - CustomRouteSample times out

akka-samples/akka-sample-camel-java/src/main/java/sample/camel/http/HttpConsumer.java

@@ -0,0 +1,21 @@
+package sample.camel.http;
+
+import akka.actor.ActorRef;
+import akka.camel.javaapi.UntypedConsumerActor;
+
+public class HttpConsumer extends UntypedConsumerActor {
+
+  private ActorRef producer;
+
+  public HttpConsumer(ActorRef producer) {
+    this.producer = producer;
+  }
+
+  public String getEndpointUri() {
+    return "jetty:http://0.0.0.0:8875/";
+  }
+
+  public void onReceive(Object message) {
+    producer.forward(message, getContext());
+  }
+}