resources: Rename Converger to ConvergerUID

This is more correct since we need the Converger method to return the
actual converger!

resources/hostname.go

@@ -108,7 +108,7 @@ func (obj *HostnameRes) Validate() error {
 
 // Watch is the primary listener for this resource and it outputs events.
 func (obj *HostnameRes) Watch(processChan chan event.Event) error {
-	cuid := obj.Converger() // get the converger uid used to report status
+	cuid := obj.ConvergerUID() // get the converger uid used to report status
 
 	// if we share the bus with others, we will get each others messages!!
 	bus, err := util.SystemBusPrivateUsable() // don't share the bus connection!