36: Added wrapper method & rights fetching to getObjectIds()

* rename old 'getObjectIds' method to 'getObjectIdsDB'
* include getAllRights() in the wrapper method
* remove field value filtering from getObjectsIdsDB()
36: Fetch ObjectIDs for a user + model from redis, if cached
36: Don't store/check for model list in Redis - just fetch it
36: Added refreshObjIds() method, call on object save; misc. cleanup
36: Convert the list of ObjectIds strings to ObjectId objects
36: Removed some debug printing & time logging