Cannot leave appliances_state_dir undefined

[sjpb]

When running without it:

TASK [systemd : Make directory for unit dropins] *******************************
fatal: [test6-control-0]: FAILED! => {"msg": "{{ _systemd_dropins_statedir if appliances_state_dir is defined else {} }}: {'opendistro': {'group': 'opendistro', 'content': '{{ _systemd_requiresmount_statedir }}'}, 'grafana-server': {'group': 'grafana', 'content': '{{ _systemd_requiresmount_statedir }}'}, 'slurmdbd': {'group': 'openhpc', 'content': '{{ _systemd_requiresmount_statedir }}'}, 'slurmctld': {'group': 'openhpc', 'content': '{{ _systemd_requiresmount_statedir }}'}, 'prometheus': {'group': 'prometheus', 'content': '{{ _systemd_requiresmount_statedir }}'}}: [Unit]\nRequiresMountsFor={{ appliances_state_dir }}\n: 'appliances_state_dir' is undefined"}