Add region tags (#1012)

* Add region tags

One for create task and one for lease and acknowledge task

* Update PullQueue.java

Updated comment markers

* Update PullQueue.java

Changed indents on comments

cloud-tasks/src/main/java/com.example.cloudtasks/PullQueue.java

@@ -65,6 +65,7 @@ private static CloudTasks createAuthorizedClient() throws IOException {
         .build();
   }
 
+  // [START cloud_tasks_create_task]
   /**
    * Create a task for a given queue with a given payload.
    */
@@ -96,7 +97,10 @@ private static Task createTask(
     System.out.println(String.format("Created task %s",task.getName()));
     return result;
   }
-
+  // [END cloud_tasks_create_task]
+
+
+  // [START cloud_tasks_lease_and_acknowledge_task]
   /**
    * Pull a single task from a given queue and lease it for 10 minutes.
    */
@@ -144,6 +148,7 @@ private static void acknowledgeTask(Task task) throws IOException {
         .execute();
     System.out.println(String.format("Acknowledged task %s", task.getName()));
   }
+  // [END cloud_tasks_lease_and_acknowledge_task]
 
   public static void main(String[] args) throws Exception {
     ArgumentParser parser = ArgumentParsers.newFor("PullQueue").build()
@@ -206,4 +211,4 @@ public static void main(String[] args) throws Exception {
     }
   }
 
-}
+}