Added support for newer version of tuned shipped with RHEL/CentOS 7

With RHEL/CentOS 7 releases, tuned was updated from version 0.2 to 2.3.
The main differences that make it not compatible with the puppet module are:
- ktune service was removed
- profile folder changed
- active-profile file changed

This patch addresses these issues so that these module can be used with
those operative systems maintaining backward compatibility.