title: FBSDK 4.7.0 and iOS 9 Invite friends not getting notification
body: <p>My application is already live and I am updating it for iOS 9. So I am updating FBSDK. Everything is working fine while inviting friends.It opens the dialog box,choose the friends for invitation but I am not getting any notification.
  Here is my code:</p>
  
  <pre><code>FBSDKAppInviteContent *content =[[FBSDKAppInviteContent alloc] init];
  content.appLinkURL = [NSURL URLWithString:@"https://fb.me/711720725626059"];
  [FBSDKAppInviteDialog showWithContent:content
                               delegate:self];
  </code></pre>
  
  <p>Can someone give me any suggestion or extension regarding the same.
  Thanks</p>