test-mediawiki-docgen on master (for now)

Change-Id: I9e3761b62a78ca6014b5948d5db3cc2417b691a1
bind parsoid jobs on 'master'

The parsoid jobs might need to be run has the jenkins user.  I am not
really sure what to do with them, so this bind them to the Jenkins
master to avoid potential regressions.  Will fix it up later on.

Change-Id: Ida2bec2fa18df4c31c3d3d60a303393e5750332f