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-pod.yaml

@@ -0,0 +1,28 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: mysql-pod
+  labels:
+    name: mysql-pod
+    context: docker-k8s-lab
+spec:
+  containers: 
+    - 
+      name: mysql
+      image: mysql:latest
+      env: 
+        - 
+          name: "MYSQL_USER"
+          value: "mysql"
+        - 
+          name: "MYSQL_PASSWORD"
+          value: "mysql"
+        - 
+          name: "MYSQL_DATABASE"
+          value: "sample"
+        - 
+          name: "MYSQL_ROOT_PASSWORD"
+          value: "supersecret"
+      ports: 
+        - 
+          containerPort: 3306