Not sure we really want to do that but it looks like a general practice on installations with systemd.
We need to discus that.
For example packages some information I've collected form different distros:
Debian/testing (stretch) (zabbix-server-mysql and zabbix-java-gateway packages):
note: debian doesn't have parent-level "zabbix-server" package
Fedora 23 (zabbix-server package):
OpenSuse (zabbix-server and zabbix-java-gateway packages):