Implement logging support

* Add 3 new puppet modules in dependencies
* Configure Logging server:
  * Configure elasticsearch
  * Configure Kibana3
* Configure Logging agent:
  * Configure fluentd
* Unit tests

Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
Merge pull request #495 from enovance/logging-support

Implement logging support