Fix delete bucket policies properly (#5540)

There was bug in previous PR where deleteBucketMetadata()
was never called, fix it correctly.

cmd/xl-sets.go

@@ -345,11 +345,13 @@ func (s *xlSets) MakeBucketWithLocation(bucket, location string) error {
 	errs := g.Wait()
 	// Upon even a single write quorum error we undo all previously created buckets.
 	for _, err := range errs {
+		if err != nil {
 			if _, ok := err.(InsufficientWriteQuorum); ok {
 				undoMakeBucketSets(bucket, s.sets, errs)
 			}
 			return err
 		}
+	}
 
 	// Success.
 	return nil
@@ -481,11 +483,13 @@ func (s *xlSets) DeleteBucket(bucket string) error {
 	// For any write quorum failure, we undo all the delete buckets operation
 	// by creating all the buckets again.
 	for _, err := range errs {
+		if err != nil {
 			if _, ok := err.(InsufficientWriteQuorum); ok {
 				undoDeleteBucketSets(bucket, s.sets, errs)
 			}
 			return err
 		}
+	}
 
 	// Delete all bucket metadata.
 	deleteBucketMetadata(bucket, s)