title: Injector returns undefined value?
body: <ol>
  <li><p>I'm trying to get the service from my legacy code and running into a weird error with <code>injector()</code> returning undefined:</p>
  
  <p><a href="http://plnkr.co/edit/jaOfl2BlWPN7UO1RXfKe?p=preview" rel="nofollow">Check this <em>plnkr</em></a></p></li>
  </ol>
  
  <hr>
  
  <ol start="2">
  <li>Also, I'm trying to set back the new property value back to the service, will that be reflected to the scope without the use of watch?</li>
  </ol>
  
  <p>Thank you very much, any pointer or suggestion is much appreciated.</p>