[BUGFIX beta] Call ArrayProxy's content change hooks

[mmun]

Provides some temporary relief for #14114.

[rwjblue]

@workmanw / @mmun - Can you confirm this fixes the addon?

[workmanw]

You need to also update the replace implementation on Ember.NativeArray to use the member methods. See: system/native_array.js#L55-L74

If you ping me after that, I'd be happy to verify the fix using the addon. Thank you.

[workmanw]

@mmun @rwjblue Actually I retract my previous statements. This actually does fix the issue because the array-mixins implementation of replace invokes sendEvent('@array:change') and Ember.ArrayProxy ultimately circles back around and calls the member function via it's array observer. So 👍.

Thank you guys. Post Ember 2.8 LTS I'm happy to work to patch ember-data-model-fragments so it doesn't depend on this behavior. It seems like setting up another array observer in their arrays could be a solution.