Koji bandaid

[Mike McGrath]

The koji builders don't check back in automatically[1] if they've lost a
connection to the host.  I put this script together in an attempt to fix
it, thought I'd post it here before sticking it on the builders.  Basic
premis is check if its checked in in 5 minutes (should be waaay more then
enough)  unless the box is under high load, then check 15 minutes, might
be over kill.

I'd like to run this check via cron every 5 minutes on each builder.
Anyone have any suggested fixes or against me running this?

	-Mike

[1] https://fedorahosted.org/koji/ticket/66