_PushStatus uses proper Parse format (#1580)

* removes mongo style props from _PushStatus

* removes log

* Update MongoTransform.js

Removes _id case

spec/ParseAPI.spec.js

@@ -1340,7 +1340,6 @@ describe('miscellaneous', function() {
        expect(res.key).toBe(1);
        return runIncrement(-1);
      }).then((res) => {
-       console.log(res);
        expect(res.key).toBe(0);
        done();
      })