Support setting VERSION for phantomjs browser

Change-Id: I9534a39e9989d8699b4c9b1908d0b02a873105c2
Normalize ZeroBanner job

Fix up the ZeroBanner job to reuse the same template as the
other project. It updates a job which is not passing anyway:

browsertests-ZeroBanner-en.m.wikipedia.org-linux-phantomjs

Change-Id: I47d7d4c2bc07fe0efbefdc523dfa7b6dffdf7d05