Fixes #5190: Redirect the output of Rudder crontab to dev null
Merge pull request #596 from Kegeruneku/bug_5190/dev/5190_redirect_output_of_crontab_to_dev_null

Fixes #5190: Redirect the output of Rudder crontab to dev null
Merge branch 'branches/rudder/2.10' into branches/rudder/2.11