resources: Update state checks

The mgmt graph depends on state tracking to eliminate redundant pokes.
With the Watch loop now able to produce events quickly, it should no
longer play a part in determining the vertex state. This simplifies the
resource API as well!

resources/pkg.go

@@ -142,7 +142,6 @@ func (obj *PkgRes) Watch(processChan chan *event.Event) error {
 			log.Printf("%s: Watching...", obj.fmtNames(obj.getNames()))
 		}
 
-		obj.SetState(ResStateWatching) // reset
 		select {
 		case event := <-ch:
 			cuid.SetConverged(false)