Move to Ansible 3.4.0 (#7672)

* Ansible: move to Ansible 3.4.0 which uses ansible-base 2.10.10

* Docs: add a note about ansible upgrade post 2.9.x

* CI: ensure ansible is removed before ansible 3.x is installed to avoid pip failures

* Ansible: use newer ansible-lint

* Fix ansible-lint 5.0.11 found issues

* syntax issues
* risky-file-permissions
* var-naming
* role-name
* molecule tests

* Mitogen: use 0.3.0rc1 which adds support for ansible 2.10+

* Pin ansible-base to 2.10.11 to get package fix on RHEL8

roles/container-engine/docker/tasks/main.yml

@@ -80,12 +80,14 @@
   template:
     src: "fedora_docker.repo.j2"
     dest: "{{ yum_repo_dir }}/docker.repo"
+    mode: 0644
   when: ansible_distribution == "Fedora" and not is_ostree
 
 - name: Configure docker repository on RedHat/CentOS/Oracle/AlmaLinux Linux
   template:
     src: "rh_docker.repo.j2"
     dest: "{{ yum_repo_dir }}/docker-ce.repo"
+    mode: 0644
   when:
     - ansible_os_family == "RedHat"
     - ansible_distribution != "Fedora"
@@ -145,7 +147,7 @@
         state: started
       when: docker_task_result is not changed
   rescue:
-    - debug:
+    - debug:  # noqa unnamed-task
         msg: "Docker start failed. Try to remove our config"
     - name: remove kubespray generated config
       file: