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/ingress_controller/cert_manager/tasks/main.yml

@@ -12,7 +12,7 @@
 - name: Cert Manager | Remove legacy namespace
   shell: |
     {{ bin_dir }}/kubectl delete namespace {{ cert_manager_namespace }}
-  ignore_errors: yes
+  ignore_errors: true  # noqa ignore-errors
   when:
     - inventory_hostname == groups['kube_control_plane'][0]
   tags: