add systemd file for the IPPIDB Web service

Former-commit-id: 9630788ac02ee28b562dd6114f067981fdbdaa36

ansible/ippidb-web.service

+[Unit]
+Description=IPPIDB Web Server
+After=network.target remote-fs.target nss-lookup.target
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/etc/ippidb-80/apachectl start
+ExecStop=/etc/ippidb-80/apachectl stop
+
+[Install]
+WantedBy=multi-user.target