Refactor the whole playbook in a block

Also switch the condition, since it is possible that
future EL version might use dnf, so checking on Fedora
distribution is less future-proof than using the pkg_mgr
from ansible.

roles/dnf-automatic/tasks/main.yml

@@ -5,40 +5,37 @@
 # We want this on any public facing Fedora installs so we
 # can pick up security updates.
 #
+- block:
+  - name: install dnf-automatic
+    dnf:
+      name: dnf-automatic
+      state: present
+    tags:
+    - packages
 
-- name: install dnf-automatic
-  dnf:
-    name: dnf-automatic
-    state: present
-  tags:
-  - packages
-  when: ansible_distribution == 'Fedora' and ansible_distribution_major_version|int > 21
+  - name: install /etc/dnf/automatic.conf
+    template:
+      src: automatic.conf.j2
+      dest: /etc/dnf/automatic.conf
+      mode: 0644
+    tags:
+    - config
 
-- name: install /etc/dnf/automatic.conf
-  template:
-    src: automatic.conf.j2
-    dest: /etc/dnf/automatic.conf
-    mode: 0644
-  tags:
-  - config
-  when: ansible_distribution == 'Fedora' and ansible_distribution_major_version|int > 21
+  - name: enable and start dnf-automatic
+    command: systemctl enable dnf-automatic.timer
+    args:
+      creates: /etc/systemd/system/basic.target.wants/dnf-automatic.timer
+    tags:
+    - config
 
-- name: enable and start dnf-automatic
-  command: systemctl enable dnf-automatic.timer
-  args:
-    creates: /etc/systemd/system/basic.target.wants/dnf-automatic.timer
-  tags:
-  - config
-  when: ansible_distribution == 'Fedora' and ansible_distribution_major_version|int > 21
+  - name: check if dnf-automatic.timer is active
+    command: systemctl is-active dnf-automatic.timer
+    register: automaticative
+    always_run: yes
+    changed_when: 1 != 1
+    ignore_errors: true
 
-- name: check if dnf-automatic.timer is active
-  command: systemctl is-active dnf-automatic.timer
-  register: automaticative
-  always_run: yes
-  changed_when: 1 != 1
-  ignore_errors: true
-  when: ansible_distribution == 'Fedora' and ansible_distribution_major_version|int > 21
-
-- name: start dnf-automatic.timer if it is not active
-  command: systemctl start dnf-automatic.timer
-  when: automaticative|failed and ansible_distribution == 'Fedora' and ansible_distribution_major_version|int > 21
+  - name: start dnf-automatic.timer if it is not active
+    command: systemctl start dnf-automatic.timer
+    when: automaticative|failed
+  when: ansible_pkg_mgr = 'dnf'