Fix the fix_and_run.sh command

Change the owner of the files to prevent:

notice: (/Stage[main]/Nagios::Master/Exec[script_fix_and_run]/returns) Error: Cannot open config file '/etc/nagios3/xifi-monitoring_...
...
notice: /Stage[main]/Nagios::Master/Exec[script_fix_and_run]/returns:    ...fail!
Add a comment on suspect chmod