fix wrong related_name in slice.service
fix wrong related_name in slice.service

opencord/xos,cboling/xos,cboling/xos,zdw/xos,open-cloud/xos,open-cloud/xos,cboling/xos,zdw/xos,cboling/xos,opencord/xos,zdw/xos,open-cloud/xos,opencord/xos,cboling/xos,zdw/xos