params on php::fpm are not used #81

Below is the current state.
![php-fpm](https://cloud.githubusercontent.com/assets/1050649/4090064/e783e27a-2f77-11e4-9f30-cf54863cb5c1.png)

Classes php::fpm::package and php::fpm::service are included in php::fpm e,g, to configure those two classes one would have to use hiera or edit corresponding parameters class. Parameters given to the instance of php::fpm class would not be used.

Below is the state after refactoring.
![php-fpm-refactored](https://cloud.githubusercontent.com/assets/1050649/4090123/f3708222-2f78-11e4-9728-5c64ea8908cc.png)
As refactored all parameters given to php::fpm will be respected.