onfocus action fires twice in tests with Ember >= 2.5

[pgengler]

See this example. The twiddle defaults to Ember 2.5.1 (and so the test fails); change it to use Ember 2.4.5 and the test will pass.

When the triggerEvent helper is used to generate a focus event in a test for the <input> in a test, the onfocus action is triggered twice. This is causing problems in our actual app, which triggers the search action on the power-select on focus.