New version of the repack tool.

The version is MUCH lighter than the previous one and consists only in a small python script talking to the stager DB.
In particular the repack DB and repack daemon are gone.
The handling of repack at the stager level has also be greatly improved, using bulk APIs and a direct access to the nameserver DB via DB link. The will make the repacking of tapes with > 1M files possible.

mediachanger/castorrmc/common/serror.c

@@ -256,7 +256,7 @@ char *sys_rterrlist[ERTMAXERR-ERTBASEOFF+2] =
  */
 char *sys_sterrlist[ESTMAXERR-ESTBASEOFF+2] =
   {"Error 0",
-   "Aborted by stageclr",
+   "Aborted",
    "Enough free space",
    "Symbolic link not created",
    "Symbolic link not supported",

mediachanger/castorrmc/h/serrno.h

@@ -262,7 +262,7 @@
  * STAGE errors
  *------------------------------------------------------------------------
  */
-#define ESTCLEARED      ESTBASEOFF+1	/* aborted by stageclr */
+#define ESTCLEARED      ESTBASEOFF+1	/* aborted */
 #define ESTENOUGHF      ESTBASEOFF+2	/* enough free space */
 #define ESTLNKNCR       ESTBASEOFF+3	/* symbolic link not created */
 #define ESTLNKNSUP      ESTBASEOFF+4	/* symbolic link not supported */