arch-boxes: Enable CPU/Memory accounting

Signed-off-by: Florian Pritz <bluewind@xinu.at>

roles/arch-boxes/tasks/main.yml

@@ -37,3 +37,6 @@
 
 - name: start and enable arch-boxes timer
   service: name='arch-boxes.timer' enabled=yes state=started
+
+- name: enable systemd ressource accounting
+  command: systemctl set-property arch-boxes CPUAccounting=yes MemoryAccounting=yes