Live connection test is flaky, blocking several PRs

The live firebase connection acceptance test (authored by @steven-ferguson ) is timing out and blocking contributor PRs. It’d be helpful if the maintainers of this repo could either correct or fix this tests so that contributions aren’t blocked or delayed.

Affected PRs:

• #533
• #528
• #527

Error message from Travis CI:

not ok 22 Firefox 51.0 - Acceptance: live firebase connection handles live connections in testing
    ---
        message: >
            timeout of 2000ms exceeded. Ensure the done() callback is being called in this test.
        stack: >
            [35]</</Runnable.prototype.resetTimeout/this.timer<@http://localhost:7357/assets/test-support.js:6326:19
            
        Log: |
    ...

[jamesdaniels]

@erichiggins not dead, undergoing a rewrite. Will have more to announce soon.

[blkeller]

I retriggered Travis builds a few times in PR #533 (with identical code each time), just to see if I was unlucky on a given day, but no dice.

Looking back at the build history, it’s very inconsistent as to whether the failure occurs or not. Over the course of three build events, test suites with identical parameters have passed at some times and failed at others. I have yet to get lucky enough for every test suite in a build to pass, though I’m guessing that if I tried for long enough, I would eventually succeed.

Links to my build history:

• First build attempt
• Second build attempt
• Third build attempt