Allow ovirt events to query since or only most recent
Allow ovirt events to query since or only most recent

The newest ovirt Rest API will return all events if no boundary is given.  This
change allows the caller to retrieve either all events since a particular event
number, or only the most recent X events.

https://bugzilla.redhat.com/show_bug.cgi?id=1114656

brandondunne/ovirt