test(@angular/cli): update path mapping test to more closely approximate error condition

Author: clydin

tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/src/app/app.module.ts

@@ -7,7 +7,7 @@
  */
 import { Component, NgModule } from '@angular/core';
 import { BrowserModule  } from '@angular/platform-browser';
-import { Foo } from 'foo/foo';
+import { Foo } from 'foo/right';
 
 console.log(Foo);  // Make sure it's used.
 

tests/legacy-cli/e2e/assets/webpack/test-app-path-mapping/src/foo/foo.js

@@ -1,3 +1,3 @@
 {
-  "main": "right/foo.js"
+  "title": "NOT_A_PACKAGE"
 }