Fix some ansible-lint complaints.

roles/apt-cacher/tasks/main.yml

@@ -1,17 +1,17 @@
 - name: install apt-cacher-ng package
   apt:
     name: apt-cacher-ng
-    state: latest
+    state: latest # noqa package-latest
 
 - name: enable apt-cacher-ng for localhost
   copy:
     src: apt.conf
     dest: /etc/apt/apt.conf
-    force: no
+    force: false
+    mode: 0644
   notify: "start apt-cacher-ng"
   when: not run_in_installer|default(false)|bool  ## do not enable apt-cacher during installation
 
-
 - name: check if preseeded installer is available
   stat: path={{ tftp_root }}/d-i/{{ di_dist }}/preseed.cfg
   register: preseedcfg
@@ -27,8 +27,8 @@
   firewalld:
     zone: internal
     port: 3142/tcp
-    permanent: yes
-    immediate: yes
+    permanent: true
+    immediate: true
     state: enabled
   when: not run_in_installer|default(false)|bool
 
@@ -36,5 +36,5 @@
   command: "firewall-offline-cmd --zone=internal --add-port=3142/tcp"
   when: run_in_installer|default(false)|bool
 
-
-- meta: flush_handlers
+- name: flush handler to make apt-cacher available
+  meta: flush_handlers