Collects a screenshot and places it on ${selenium.compare.image.collect.dir} defined in jspringbot.properties

*Arguments:*
| filename - name of the captured screenshot to be collected

*Example:*
| Navigate To        | http://jspringbot.org   |
| Screenshot Collect | jspringbot-homepage.png |

*jspringbot.properties*
| selenium.compare.image.collect.dir=/Users/shielabuitizon/workspace/jspringbot-selenium/src/test/resources/imgbaseline/local-firefox
