This converts the reprepro mirror script to use the common functions
for timestamps and vos release. This function ssh's to the AFS server
and runs vos release directly there, avoiding many issues with
kerberos timeouts. This has been working successfully for the rsync
mirrors. This will also send stats back so we can keep an eye on the
timing.
Change-Id: I1be29f2d9ecaad03b22c87819e5ae8d16c4f177e
6ee7a5a116