Enable Protractor directConnect

This allows Protractor to test against Chrome, Firefox directly, without
the need for a running Selenium Webdriver server. See:
https://github.com/angular/protractor/blob/master/docs/server-setup.md#connecting-directly-to-browser-drivers

_This *may* obviate an issue where Protractor is not able to connect to the Selenium Webdriver server on some internal CI slaves._