fix(cli): clean up template for life cycle observers

Author: raymondfeng

packages/cli/generators/observer/templates/observer-template.ts.ejs

@@ -1,7 +1,6 @@
 import {
   /* inject, Application, CoreBindings, */
   lifeCycleObserver, // The decorator
-  CoreTags,
   LifeCycleObserver, // The interface
 } from '@loopback/core';
 
@@ -28,6 +27,6 @@ export class <%= className %> implements LifeCycleObserver {
    * This method will be invoked when the application stops
    */
   async stop(): Promise<void> {
-    // Add your logic for start
+    // Add your logic for stop
   }
 }

packages/cli/test/integration/generators/observer.integration.js

@@ -81,6 +81,8 @@ function verifyGeneratedScript(group = '') {
   );
   assert.fileContent(expectedFile, `@lifeCycleObserver('${group}')`);
   assert.fileContent(expectedFile, /async start\(\): Promise\<void\> {/);
+  assert.fileContent(expectedFile, /\/\/ Add your logic for start/);
+  assert.fileContent(expectedFile, /\/\/ Add your logic for stop/);
   assert.fileContent(expectedFile, /async stop\(\): Promise\<void\> {/);
   assert.file(INDEX_FILE);
   assert.fileContent(INDEX_FILE, /export \* from '.\/my-observer.observer';/);