Upgrade APNS to use HTTP/2

- uses universal certificate
- removes tests logs
- standardized returned promises from APNS and GCM to something usable in _PushStatus

spec/PushController.spec.js

@@ -143,7 +143,7 @@ describe('PushController', () => {
         }
       })
       return Promise.resolve({
-        error: null
+        error: null,
         payload: body,
       })
     },