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/network_plugin/kube-router/tasks/main.yml

@@ -12,12 +12,12 @@
   run_once: true
 
 - name: kube-router | Wait for kube-router pods to be ready
-  command: "{{ bin_dir }}/kubectl -n kube-system get pods -l k8s-app=kube-router -o jsonpath='{.items[?(@.status.containerStatuses[0].ready==false)].metadata.name}'"   # noqa 601
+  command: "{{ bin_dir }}/kubectl -n kube-system get pods -l k8s-app=kube-router -o jsonpath='{.items[?(@.status.containerStatuses[0].ready==false)].metadata.name}'"   # noqa 601 ignore-errors
   register: pods_not_ready
   until: pods_not_ready.stdout.find("kube-router")==-1
   retries: 30
   delay: 10
-  ignore_errors: yes
+  ignore_errors: true
   delegate_to: "{{ groups['kube_control_plane'] | first }}"
   run_once: true
   changed_when: false