Properly escape % in cron command

crontab syntax requires % to be escaped, but puppet complains about '\%'
in strings, so we need to double escape it in puppet. This will result
in a single-escaped % in the crontab.

Change-Id: I2fcb3fca5b2d09e8b0a15036c8d4cbad1a83ba3a

manifests/fetch_remotes.pp

@@ -22,7 +22,7 @@ class jeepyb::fetch_remotes(
     ensure  => $ensure,
     user    => $user,
     minute  => $minute,
-    command => "sleep $((RANDOM%60+90)) && /usr/local/bin/manage-projects -v >> ${logfile} 2>&1",
+    command => "sleep $((RANDOM\\%60+90)) && /usr/local/bin/manage-projects -v >> ${logfile} 2>&1",
   }
 
   include ::logrotate