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

test-infra/image-builder/roles/kubevirt-images/tasks/main.yml

@@ -4,6 +4,7 @@
   file:
     state: directory
     path: "{{ images_dir }}"
+    mode: 0755
 
 - name: Download images files
   get_url:
@@ -39,6 +40,7 @@
   template:
     src: Dockerfile
     dest: "{{ images_dir }}/Dockerfile"
+    mode: 0644
 
 - name: Create docker images for each OS  # noqa 301
   command: docker build -t {{ registry }}/vm-{{ item.key }}:{{ item.value.tag }} --build-arg cloud_image="{{ item.key }}.qcow2" {{ images_dir }}