I had the same problem. Most likely in /etc/crontab there is a line that looks like the following:
17 * * * * root run-parts --report /etc/cron.hourly
If you comment it out the messages will stop Or you can make it look like the others.
Something like:
17 * * * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.hourly )
I actually think that is the right answer but all of the stuff in that file is non-standard on a Centos 6 machine, so I am not sure why this was done.
The stock crontab on Centos6 looks like the following:
(bugs pts7) # cat /etc/crontab
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/
# For details see man 4 crontabs
# Example of job definition:
# .---------------- minute (0 - 59)
# | .------------- hour (0 - 23)
# | | .---------- day of month (1 - 31)
# | | | .------- month (1 - 12) OR jan,feb,mar,apr ...
# | | | | .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# | | | | |
# * * * * * user-name command to be executed
HTH,
Tom