Add more browser testing with Sauce Labs.

[heathkit]

Here's a simple example of one way to add support for testing on Sauce Labs. No need to actually merge this, it's just intended as an example.

[cnishina]

Instead of trying to override an existing with an Object.assign, could we instead do something like:

var defaultConfig = require('./protractor.conf.js').config;

defaultConfig.directConnect = undefined;
defaultConfig.seleniumAddress = undefined;
defaultConfig.sauceUser
...

exports.config = defaultConfig;

similar to https://github.com/angular/protractor/blob/6a667c8a3211ac451a264544bb6f44dfe29f7b74/spec/ciNg2Conf.js

[cnishina]

Also, defaultConfig.capabilities = undefined to get rid of the warning

[heathkit]

Turns out the problem was I was using an old Sauce Labs account, which didn't have any VM minutes for automated testing. Instead of throwing an error, Sauce would just hang forever waiting to launch.

Also, this uncovered a bug in Protractor. The way 'beforeLaunch' is used to set up ts-node doesn't actually work with multiCapabilities, because of the way we fork in the launcher. I suspect that if you used test sharding, that would also break.