This is likely a side-effect of the restructuring of the code base:
[root@centos7 ~]# rpm -q openattic-base
[root@centos7 ~]# oaconfig restart
Redirecting to /bin/systemctl restart openattic-systemd.service
Failed to issue method call: Unit openattic-systemd.service failed to load: No such file or directory.
[root@centos7 ~]# file /lib/systemd/system/openattic-*
/lib/systemd/system/openattic-rpcd.service: broken symbolic link to `/usr/share/openattic/etc/systemd/openattic-rpcd.service'
/lib/systemd/system/openattic-systemd.service: broken symbolic link to `/usr/share/openattic/etc/systemd/openattic-systemd.service'
[root@centos7 ~]# file /usr/share/openattic/etc
/usr/share/openattic/etc: cannot open (No such file or directory)
Seems like the entire etc subdirectory is missing from the package.