Upgrade Selenium to version 2.53.1 and Selenium-htmlunit to version 2.21
Upgrade Selenium to version 2.53.1 and Selenium-htmlunit to version 2.21

dhirajsb/fabric8,rhuss/fabric8,dhirajsb/fabric8,rhuss/fabric8,chirino/fabric8v2,chirino/fabric8v2,dhirajsb/fabric8,chirino/fabric8v2,rhuss/fabric8,chirino/fabric8v2,dhirajsb/fabric8,rhuss/fabric8