[471053] Add systemd support and services.

Add possibility to notify systemd that service is fully started. Also add
reference service files.

Change-Id: Ib4e39c8406ab6c15e1b88f197ae8f91c3e402023
Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=471053


Signed-off-by: Tomas Novotny <novotny@rehivetech.com>