Modify adminbot for use with a grid engine.

The bot can still run in the old mode, pulling configs from
/etc/adminbot.  But now it can also be run by specifying a single
--config on the commandline; in that case it will log to stderr
so that Grid Engine can manage log rotation.

Change-Id: If1d15a8d7fddffc800e582dbcc26ef679e5885b2