Squashing commits

adding a Java EE sample, fixing #11477

adding location to the source

adding partial review comments from #12110

adding syncer macros and fixing links

examples/javaee/mysql-service.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata: 
+  name: mysql-service
+  labels: 
+    name: mysql-pod
+    context: docker-k8s-lab
+spec: 
+  ports:
+    # the port that this service should serve on
+    - port: 3306
+  # label keys and values that must match in order to receive traffic for this service
+  selector: 
+    name: mysql-pod
+    context: docker-k8s-lab