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/network_plugin/cilium/tasks/apply.yml

@@ -16,7 +16,7 @@
   until: pods_not_ready.stdout.find("cilium")==-1
   retries: 30
   delay: 10
-  ignore_errors: yes
+  fail_when: false
   when: inventory_hostname == groups['kube_control_plane'][0]
 
 - name: Cilium | Hubble install

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

@@ -23,7 +23,7 @@
   slurp:
     src: /etc/cni/net.d/10-kuberouter.conflist
   register: cni_config_slurp
-  ignore_errors: true
+  ignore_errors: true  # noqa ignore-errors
 
 - name: kube-router | Set cni_config variable
   set_fact: