message: test(aio): import zone.js in tests
diff: // This file is required by karma.conf.js and loads recursively all the .spec and framework files
  +import 'zone.js/dist/zone';
  import 'zone.js/dist/long-stack-trace-zone';
  import 'zone.js/dist/proxy.js';
  import 'zone.js/dist/sync-test';
  