The job to look at is
http://jenkins.mw.lab.eng.bos.redhat.com/hudson/job/jbosstools-install-grinder.install-tests.matrix_master/
It's currently unstable because of various issues, mainly with
metacity on CI slaves, over and over again. So since it's often
failing, the error notifications get ignored at the moment,
But anyway, specifically for the change about certification URL you
linked, install-grinder doesn't follow certification URL links and
such issues don't prevent Central or installation from working, so
even with a wrong URL at that locaiton, install succeeds and we get
no notification.