1 - Add params to set the service_ensure and service_enable

This commit resolve #1

I create two new params:
* `service_ensure` : use to start or stop the service (default to `true`)
* `service_enable` : use to start or stop the service at startup (default to `true`)
Merge pull request #2 from rpignolet/1_add-params-service

1 - Add params to set the service_ensure and service_enable