Update example supervisor configuration file
Update example supervisor configuration file

supervisord should run as root and spawn the lemur process as the lemur
user. I also added the LEMUR_CONF environment variable because it was
not reading the configuration file in by default.

kevgliss/lemur,Netflix/lemur,nevins-b/lemur,Netflix/lemur,kevgliss/lemur,nevins-b/lemur,Netflix/lemur,rpicard/lemur,Netflix/lemur,rpicard/lemur,kevgliss/lemur,rpicard/lemur,nevins-b/lemur