docs(tutorial): fix controller unit tests to match phonecat / avoid ReferenceError
docs(tutorial): fix controller unit tests to match phonecat / avoid ReferenceError

fix 'ReferenceError: PhoneDetailCtrl is not defined' & 'ReferenceError: PhoneListCtrl is not defined' in Karma unit tests

Closes #7421

ggershoni/angular.js,ggershoni/angular.js,ggershoni/angular.js,ggershoni/angular.js