chimera: fix creation time attribute for tags

Fixes: 8269a85

Motivation:
since commmit 8269a85 NFS exposes files creation time attribute. As
tags simulates file, then stating on tags must provide creation time
attribute as well.

Modification:
fix creation time attribute for tags

Result:
regression is fixed.

Fixes: #6608
Acked-by: Albert Rossi
Acked-by: Lea Morschel
Target: master
Require-book: no
Require-notes: no

modules/chimera/src/main/java/org/dcache/chimera/FsSqlDriver.java

@@ -1353,6 +1353,7 @@ Stat statTag(FsInode dir, String name) throws ChimeraFsException {
                       ret.setATime(rs.getTimestamp("iatime").getTime());
                       ret.setCTime(rs.getTimestamp("ictime").getTime());
                       ret.setMTime(rs.getTimestamp("imtime").getTime());
+                      ret.setCrTime(ret.getMTime());
                       ret.setUid(rs.getInt("iuid"));
                       ret.setGid(rs.getInt("igid"));
                       ret.setMode(rs.getInt("imode"));