Key events: e2e test failing on my (AZERTY) computer

`./scripts/ci/build_and_test.sh js` generates the following error

```
Failures:
1) key_events should display correct key names
  Message:
    Expected 'q' to be 'a'.
  Stack:
    Error: Failed expectation
        at Object.<anonymous> (/home/victor/dart/angular/dist/js/cjs/examples/e2e_test/key_events/key_events_spec.js:21:33)

```
