core: Add setup events log

Add to the report /var/lib/ovirt-engine/setup-history.txt, created
by http://gerrit.ovirt.org/15863

Change-Id: I7c159eeab80f7953470e7451559ba87b9cd024a0
Signed-off-by: Yedidyah Bar David <didi@redhat.com>
Bug-Url: https://bugzilla.redhat.com/889271