Change import of deprecate from @ember/application/deprecations to @ember/debug (#458)

Author: colinfkennedy

addon/mocks/exposed-request-functions.js

@@ -1,5 +1,5 @@
 import { typeOf } from '@ember/utils';
-import { deprecate } from '@ember/application/deprecations';
+import { deprecate } from '@ember/debug';
 import { assert } from '@ember/debug';
 import Model from 'ember-data/model';
 import FactoryGuy from '../factory-guy';