Update params.pp

In email:

/etc/cron.daily/munin-autoconfigure has exited with return code 3

Investigation:-

# /etc/init.d/munin-node reload
 * The "reload" action is not implemented
# echo $?
3
# cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04 LTS"
#