fix: import package in template

Author: jannyHou

packages/cli/generators/app/templates/src/controllers/ping.controller.ts.ejs

@@ -1,5 +1,4 @@
-import {Request, RestBindings} from '@loopback/rest';
-import {get} from '@loopback/openapi-v3';
+import {Request, RestBindings, get} from '@loopback/rest';
 import {inject} from '@loopback/context';
 
 /**

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

@@ -54,7 +54,7 @@ describe('app-generator specific files', () => {
     assert.fileContent('src/controllers/ping.controller.ts', /ping\(\)/);
     assert.fileContent(
       'src/controllers/ping.controller.ts',
-      /\'\@loopback\/openapi\-v3\'/,
+      /\'\@loopback\/rest\'/,
     );
   });
 });