master-qa-7313

https://issues.liferay.com/browse/LIFERAYQA-7313

This is for: https://github.com/brianchandotcom/liferay-qa-portal-legacy-ee/pull/32

I abstracted "build-selenium-new" into a macrodef so that I can call it in the macrodefs in liferay-qa-portal-legacy-ee. I named the macrodef "build-selenium" because in the future we should be getting rid of "build-selenium-new" and "build-selenium-old".