Integrating selenium-java-robot.

This PR integrates the [Selenium Java Robot](https://github.com/ariatemplates/selenium-java-robot) so that it is easy to start a browser to run the campaign with the `--robot-browser` command line parameter.
Indeed. I have just implemented this in [this commit](https://github.com/ariatemplates/selenium-java-robot/commit/3c66fa7cd681660f23b239ed3067f98713ea5e9d). I will update this code.