[SDL 0340] ATF Selenium Support

Proposal: [ATF Selenium Support](https://github.com/smartdevicelink/sdl_evolution/blob/master/proposals/0340-atf-selenium-support.md)

> This proposal is to integrate the Generic HMI into ATF tests scripts by using Selenium to control a web browser programmatically.

Review: https://github.com/smartdevicelink/sdl_evolution/issues/1164