stopping and disabling firewalld if service is present

roles/slurm-start/tasks/main.yml

 ---
+- name: Populate service facts
+  service_facts:
+
+- name: stop and disable firewalld
+  service:
+    name: firewalld
+    state: stopped
+    enabled: false
+  become: true
+  when: services["firewalld.service"].state == "running"
+
 - name: set use_systemd
   set_fact:
     use_systemd: True