Rename LogPayload to TaskHandler.

Author: kurtisvg

flexible/cloud-tasks/src/main/java/com/example/cloudtasks/LogPayloadServlet.java renamed to flexible/cloud-tasks/src/main/java/com/example/cloudtasks/TaskHandlerServlet.java

@@ -26,9 +26,9 @@
 import javax.servlet.http.HttpServletResponse;
 
 
-@WebServlet(value = "/log_payload")
+@WebServlet(value = "/example_task_handler")
 @SuppressWarnings("serial")
-public class LogPayloadServlet extends HttpServlet {
+public class TaskHandlerServlet extends HttpServlet {
 
   @Override
   public void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException {