Migrate AutomaticUpdateScheduler from IStartup to OSGi EventHandler#400

HannesWell wants to merge 2 commits intoeclipse-equinox:mastereclipse-equinox/p2:masterfrom

HannesWell:update-scheduler-as-eventHandlerHannesWell/eclipse.equinox.p2:update-scheduler-as-eventHandlerCopy head branch name to clipboard