Fix initializer deprecation warning for >= ember 2.1.0
Fix initializer deprecation warning for >= ember 2.1.0

fivetanley/active-model-adapter,fivetanley/active-model-adapter,bmac/active-model-adapter,ember-data/active-model-adapter,jcope2013/active-model-adapter,fivetanley/active-model-adapter,bmac/active-model-adapter,bmac/active-model-adapter,bmac/active-model-adapter,ember-data/active-model-adapter,jcope2013/active-model-adapter,jcope2013/active-model-adapter,jcope2013/active-model-adapter,fivetanley/active-model-adapter,ember-data/active-model-adapter