Puppetmaster's logrotate made graceful

When the puppmaster logs are rotated everyday a SIGHUP is sent to apache
to force it to reload and start writing to the new files. However that
would kill connections from clients to the puppetmaster causing failed
runs and then nagios checks to whine. Fix this by doing a graceful
restart. This may have the drawback of taking longer for the daemon to
close the old files and open the new ones but not much more than that

Change-Id: I70d59343cf382b3daae2fe650abd843b9e4f64ad