Fix check ferm service presence before reload

roles/ferm-configure/handlers/main.yml

 ---
 
 - name: reload ferm
+  when: ansible_facts.services['ferm.service'] is defined
   systemd:
     name: ferm
     state: reloaded

roles/ferm-configure/tasks/main.yml

 ---
 
+- name: populate service facts
+  service_facts:
+
+- debug:
+    var: ansible_facts.services
+
 - name: directories
   loop:
     - /etc/ferm/ferm.d