Replacing Firefox driver to PhantomJS driver

PhantomJS.java

// Current Implementation - Using FirefoxDriver
@Before
public static void before() {
    driver = new FirefoxDriver();
    
    admin = new AdminApi();
    user = new UserApi(driver);
    screen = new ScreenApi(driver);
}

// New Implementation - Using PhantomJSDriver
@Before
public static void before() {
    DesiredCapabilities caps = new DesiredCapabilities();
    caps.setJavascriptEnabled(true);
    caps.setCapability("takesScreenshot", true);
    driver = new PhantomJSDriver(caps);
}