fix: site replication of bucket deletion sync (#352)

Bucket deletion timestamp was not being passed back
in GetBucketInfo, which is needed to decide on the bucket
creation/deletion

cmd/storage-datatypes.go

@@ -111,6 +111,9 @@ type VolInfo struct {
 
 	// total VolInfo counts
 	count int
+
+	// Date and time when the volume was deleted, if Deleted
+	Deleted time.Time
 }
 
 // FilesInfo represent a list of files, additionally