control: Add event trigger creation

Event triggers are created by the events JSON configuration given a
trigger class name. That class name is used to lookup the associated
function in order to create the trigger by that class name. Triggers are
not required to be kept around/stored on the event, so that ability was
removed.

Change-Id: I3333b312a063e952d858f78fe80df85820eb5bba
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
2 files changed