Currently this is broken on mirror-update.o.o, the reason seems to be
upstream security.debian.org is a separate pool, but we are trying to
add it into a single pool.
This is causing checksum issues on files we download.
For now, remove debian-security and update jobs to pull directly from
security.debian.org. A follow up patch will move this into its own
pool for reprepro creating mirror.debian-security.
Change-Id: Id918597aecc5114791811c7f30b6109da6a8d0af
Signed-off-by: Paul Belanger <pabelanger@redhat.com>