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/kubernetes-apps/metallb/tasks/main.yml

@@ -55,7 +55,7 @@
   command: "{{ bin_dir }}/kubectl --kubeconfig /etc/kubernetes/admin.conf -n metallb-system get secret memberlist"
   register: metallb_secret
   become: true
-  ignore_errors: yes
+  ignore_errors: true  # noqa ignore-errors
   when:
     - inventory_hostname == groups['kube_control_plane'][0]