do not use dataDir to reference inline data use versionID (#11942)

versionID is the one that needs to be preserved and as
well as overwritten in case of replication, transition
etc - dataDir is an ephemeral entity that changes
during overwrites - make sure that versionID is used
to save the object content.

this would break things if you are already running
the latest master, please wipe your current content
and re-do your setup after this change.

cmd/xl-storage-format-v2.go

@@ -702,9 +702,10 @@ func (z *xlMetaV2) AddVersion(fi FileInfo) error {
 				ventry.ObjectV2.MetaUser[k] = v
 			}
 		}
+
 		// If asked to save data.
 		if len(fi.Data) > 0 || fi.Size == 0 {
-			z.data.replace(dd.String(), fi.Data)
+			z.data.replace(fi.VersionID, fi.Data)
 		}
 	}