adding rodjeks excellent logrotate module
style tidyup
ensure logrotate file dropped in by the percona deb is absent in favour of our own
temp disable dropping in a my.cnf until it can be tuned
break out install perconas apt repo into separate sub class
break out install perconas apt repo into separate sub class
logrotate is now managed by logrotate::rules
remove ugly run stages and set some ordering