So we could write a clever setuptools target which would let
you adjust the timers by some given offset prior to install,
but that just seems like a chunk of work. The current times
set for the nightly timers - 04:15 thru 04:17 - are tweaked
for the old openQA deployment, which is on Eastern Standard
Time; the servers for the new fp.o deployment have their clocks
set to UTC, so for that deployment, we want the jobs to run
at 09:15 thru 09:17. For the record, I picked the times by
looking at when nightlies are usually complete; the times I
picked are intended to make the server wake up and start
waiting for the nightlies about 2 hours before they generally
are actually done.

For the BOS deployment we can simply avoid pulling this change,
or hand edit the timers back to the 04:xx values after install.

Apply to the fp.o staging deployment and check that
it now runs on the nightlies (as opposed to starting to wait
too early, and giving up before they appear).