packaging: service: rename engine service file to match service name

Always install sysv and systemd, this makes the packaging
directory consistent with the naming scheme and
the outcome on filesystem after installation.

Change-Id: I2f10ef8329dd8f2f872f7c6dfebd01f73b151a0c
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>