Clear meta data when unloading all records for a type. Fixes #2772

[runspired]

No description provided.

[wecc]

Probably want to do Ember.create(null) instead of {} here

[runspired]

Changed. Are there docs somewhere on Ember.create ? It's not in the website api docs. I'm assuming this is the underlying instantiation method (similar to Ember.set or Ember.get) that get's added to Ember.Object?

[wecc]

Had a brief chat with @bmac about maybe clearing the typeMap for the specified type all together instead of nullifying separate properties (findAllCache, metadata). Thoughts @igorT?

[runspired]

@wecc I personally think that makes sense. I'm assuming if desired doing so would involve doing this after unloading the records?

var typeMaps = get(this, 'typeMaps');
var guid = Ember.guidFor(type);
if (typeMaps[guid]) {
    delete typeMaps[guid];
}

[runspired]

@wecc also, any idea why the build can't complete? Can't get the tests to run locally, just hangs forever, seems same issue is happening with the CI tests.

[wecc]

@runspired failing build should be fixed on master, can you rebase?

[igorT]

Thanks for the PR! Can you squash/rebase and I'll or @wecc will merge

[runspired]

@igorT @wecc squashed and rebased