enable localdatastore and use live query, case "Attempted to change an objectId to one that's already known to the Offline Store."

[dilongl]

enable localdatatore
use the liveQuery

call the ParseObject.saveInBackground and use the liveQuery subscribe the same ClassName,
due to liveQuery receive data then call ParseObject.fromJSON to build a new ParseObject object, case "Attempted to change an objectId to one that's already known to the Offline Store." when the ParseObject.saveInBackground call updateObjectId.

[Jawnnypoo]

Dupe of #267