fix: r/vsphere_nas_datastore not mounted to additional hosts as day-t…

…wo (#1860)

Fix a bug in nasDatastoreMountProcessor.diff() method which was the root cause of #1589

vsphere/nas_datastore_helper.go

@@ -50,12 +50,13 @@ func (p *nasDatastoreMountProcessor) diffNewOld() []string {
 
 // diff is what diffOldNew and diffNewOld hand off to.
 func (p *nasDatastoreMountProcessor) diff(a, b []string) []string {
-	var found bool
 	c := make([]string, 0)
 	for _, v1 := range a {
+		found := false
 		for _, v2 := range b {
 			if v1 == v2 {
 				found = true
+				break
 			}
 		}
 		if !found {