Created a couple of VisualEditor test2.wikipedia.org jobs

Created jobs:

browsertests-VisualEditor-test2.wikipedia.org-linux-chrome-sauce
browsertests-VisualEditor-test2.wikipedia.org-linux-firefox-sauce

Paired with: Chris McMahon

Change-Id: I9bda2ecd7b2f6691fbbb87601a3b859b69efaea9