[ALOY-730] Fetching different models with a specific idAttribute inserts instead of replaces the "old" object in the fetch success response object.

*Problem* A model is created. The id of the model is set to a specific id. A fetch is made. When repeating this for another model with a different id results in a succes response object with 2 objects. There should be only one object because the fetch is for 1 specific object determined by the id. I've tried to create a collection and use the reset() function in all possible ways. Same situation/error. The created model doesn't have a reset method. We prefer lazyloading of the object. Therefore we pass the objectId in the args.objectId. When creating this controller the code is executed and extra data is received with a get from the server. *Source*

var args = arguments[0] || {};
Ti.API.info('args.objectId');
Ti.API.info(args.objectId);

$.plaatsing.open();

var plaatsing = Alloy.createModel('plaatsing');

plaatsing.id = args.objectId;

plaatsing.fetch({
	
	success : function(model) {
				
		alert('succes: ' + JSON.stringify(model));
			
			var plaatsing = model.toJSON();
			
			var p = plaatsing[0];						
	
			$.view1Block1Header.setText(p.plaatsing);
	},
	error : function(model) {
		alert(' error ' + model);
	}
});

function(model) here the model object is growinng in size by each new object instead of just containing the object where the id is set.