cap.java

@Override
public void beforeSession(TestSession session) {
	super.beforeSession(session);
	// find a free display.
	int x = getFreeDisplay();
	if (x == -1) {
		log.warn(getVm().getName() + "Error routing the test");
		return;
	}
	if (session.getRequestedCapabilities().get("browserName").equals("chrome")) {
		session.getRequestedCapabilities().put("chrome.switches", new String[] { "--display=:" + x });
	}