Update integration test

[sbatson5]

The integration test currently on master is using the old moduleForComponent format. I started working on updating it but ran into an issue with the timers. We'll want to update the test to this format:

module('Integration | Component | flash message', function(hooks) {
  setupRenderingTest(hooks);
  ...
});

[esbanarango]

@sbatson5 I can help here ✋

[sbatson5]

Thanks! Let me know if you have questions. Like I said, I gave it a stab but hit a road block when it came to testing the timing logic. i.e.

• A message should disappear after x amount of seconds.
• If you mouse over a message, it should not disappear, even if the timer has expired

I think the issue is around await render versus the old this.render -- I think await is causing all the lifecycle hooks to finish before the assertions run but I haven't had the time to investigate

[abhilashlr]

@sbatson5 @esbanarango I've clubbed #306 and #305 into a single PR - #308

[esbanarango]

That's great @abhilashlr 🙏. I'll check if there is any remaining work to-do during weekend.

[abhilashlr]

Except for ember-release, and ember-canary the builds seem to pass. It is failing in CircleCI due to node version being 6. #309 attempts to address that.

[sbatson5]

Awesome! I should be able to take a look during some free time later today