[iOS] Social Oauth2 with Facebook

As per Android PR:
https://github.com/aerogear/aerogear-android-cookbook/pull/68/files
upload scope should be:
scopes:["publish_actions"], remove photo_upload

Fix upload issue, when trying to upload error:
Optional<NSError>

• Some : Error Domain=ResponseSerializerDomain Code=-1011 "Invalid response received, can't parse JSON" UserInfo={NetworkingOperationFailingURLResponseErrorKey=<NSHTTPURLResponse: 0x610000226a80> { URL: https://graph.facebook.com/oauth/access_token }
  Unknown macro: { status code}