Cache our list of queried bug #'s for each package for 15 minutes.
Cache our list of queried bug #'s for each package for 15 minutes.

This cuts down each bugzilla grid query from 2 Bugzilla requests
to 1.  We should eventually try and cache the entire bug list
for a given package for 10 minutes or so, to make the grid a bit
more responsive.

Fale/fedora-packages,Fale/fedora-packages,fedora-infra/fedora-packages,fedora-infra/fedora-packages,fedora-infra/fedora-packages,fedora-infra/fedora-packages,Fale/fedora-packages