Redirect APFmon curl update stdout/stderr to /dev/null
Revert "Move condor user logs to one file per job (APFMon links to it)"

This change breaks our statistics-gathering, and Condor doesn't support
multiplexed user/event logs.  We'll have to find another way.

This reverts commit 6a4b893fefb65d0df28751411020237541cc96bd.
Bundle simplejson with glideinWMS

Simplejson isn't available in SL5 (except in EPEL), it's python, it's
small, we use it for very little, and there's quite a bit of namespace
pollution with various 3rd party json solutions.
Use bundled simplejson in APFMonClient