Add cacti server

Depends on https://github.com/cargomedia/puppet-packages/pull/168 and https://github.com/cargomedia/puppet-packages/pull/261
![puppet-cacti - new page](https://f.cloud.github.com/assets/1843523/1620976/b3f1e722-5683-11e3-915e-33d08e3302d4.png)