WIP:feat(ch9s6): add initial code for GE

The "mvn fabric8:deploy" command still does not work, mostly because
it seems that the deployed "service" contains selectors for labels
that are not present on the associated Pod.

micro-java/src/main/java/com/redhat/training/openshift/hello/HelloResource.java

@@ -0,0 +1,27 @@
+package com.redhat.training.openshift.hello;
+
+import javax.inject.Inject;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+
+@Path("/")
+public class HelloResource {
+
+    @GET
+    @Path("/hello")
+    @Produces("text/plain")
+    public String hello() {
+        String hostname = System.getenv().getOrDefault("HOSTNAME", "unknown");
+	      String message = System.getenv().getOrDefault("APP_MSG", null);
+	      String response = "";
+
+      	if (message == null)
+      	  response = "Hello world from host "+hostname+"\n";
+      	else
+      	  response = "Hello world from host ["+hostname+"].";
+      	  response += "Message received = "+message+"\n";
+
+        return response;
+    }
+}

micro-java/src/main/java/com/redhat/training/openshift/hello/JaxRsActivator.java

@@ -0,0 +1,8 @@
+package com.redhat.training.openshift.hello;
+
+import javax.ws.rs.ApplicationPath;
+import javax.ws.rs.core.Application;
+
+@ApplicationPath("/api")
+public class JaxRsActivator extends Application {
+}