pgraph, resources: Improve Init/Close and Worker status

This should do some rough cleanups around the Init/Close of resources,
and tracking of Worker function status.

pgraph/actions.go

@@ -316,7 +316,11 @@ func (g *Graph) Worker(v *Vertex) error {
 	// the Watch() function about which graph it is
 	// running on, which isolates things nicely...
 	obj := v.Res
-	obj.SetWorking(true) // gets set to false in Res.Close() method at end...
+
+	// run the init (should match 1-1 with Close function if this succeeds)
+	if err := obj.Init(); err != nil {
+		return errwrap.Wrapf(err, "could not Init() resource")
+	}
 
 	lock := &sync.Mutex{} // lock around processChan closing and sending
 	finished := false     // did we close processChan ?
@@ -629,7 +633,7 @@ func (g *Graph) Start(first bool) { // start or continue
 			go func(vv *Vertex) {
 				defer g.wg.Done()
 				// TODO: if a sufficient number of workers error,
-				// should something be done? Will these restart
+				// should something be done? Should these restart
 				// after perma-failure if we have a graph change?
 				if err := g.Worker(vv); err != nil { // contains the Watch and CheckApply loops
 					log.Printf("%s[%s]: Exited with failure: %v", vv.Kind(), vv.GetName(), err)