fix ansible_lint issues

Use prefix for role variables, have an ending newline at the end of
files and use changed_when for command.
Also exclude *.sops.yaml files from ansible-lint.

inventories/z9/host_vars/yate.yaml

@@ -6,4 +6,4 @@ docker_compose__configuration_files:
     content: "{{ lookup('ansible.builtin.template', 'resources/z9/yate/docker_compose/regexroute.conf.j2') }}"
   - name: regfile.conf
     content: "{{ lookup('ansible.builtin.template', 'resources/z9/yate/docker_compose/regfile.conf.j2') }}"
-docker_compose__restart_cmd: "exec yate sh -c 'kill -1 1'"
+docker_compose__restart_cmd: "exec yate sh -c 'kill -1 1'"