deb: Include cron job for billing compression and indexing

Target: trunk
Request: 2.7
Require-notes: no
Require-book: no
Acked-by: Paul Millar <paul.millar@desy.de>
Patch: http://rb.dcache.org/r/6216/
(cherry picked from commit cf33d78af4e828e2f99b8bc211753699040ce11a)
Merge pull request #272 from gbehrmann/fix/2.7/rb6216

deb: Include cron job for billing compression and indexing