[ALOY-1129] Delete method shouldn't reset model's id
|Fix Version/s||Alloy 1.6.0|
|Assignee||Feon Sua Xin Miao|
DescriptionCommunity PR https://github.com/appcelerator/alloy/pull/547 "Model's ID should not be deleted (reset) in the adapter. The problem is that after the Sync is done Backbone will trigger destroy which will execute a method called _onModelEvent -> remove ,but model doesn't have an id anymore ,so it won't be deleted from a collection - set _byId. If you try to add a new model to the collection with the same ID, backbone will not allow you to do that because the ID already exists in the set."