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/remove-node/post-remove/tasks/main.yml

@@ -1,5 +1,5 @@
 ---
-- name: Delete node  # noqa 301
+- name: Delete node  # noqa 301 ignore-errors
   command: "{{ bin_dir }}/kubectl delete node {{ kube_override_hostname|default(inventory_hostname) }}"
   delegate_to: "{{ groups['kube_control_plane']|first }}"
-  ignore_errors: yes
+  ignore_errors: true

roles/remove-node/remove-etcd-node/tasks/main.yml

@@ -27,7 +27,7 @@
 - name: Lookup etcd member id
   shell: "{{ bin_dir }}/etcdctl member list | grep {{ node_ip }} | cut -d, -f1"
   register: etcd_member_id
-  ignore_errors: true
+  ignore_errors: true  # noqa ignore-errors
   changed_when: false
   check_mode: no
   tags: