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/bootstrap-os/tasks/bootstrap-fedora-coreos.yml

@@ -11,7 +11,7 @@
 - name: Remove podman network cni
   raw: "podman network rm podman"
   become: true
-  ignore_errors: yes
+  ignore_errors: true  # noqa ignore-errors
   when: need_bootstrap.rc != 0
 
 - name: Clean up possible pending packages on fedora coreos
@@ -43,7 +43,7 @@
 - name: Reboot immediately for updated ostree, please run playbook again if failed first time.
   raw: "nohup bash -c 'sleep 5s && shutdown -r now'"
   become: true
-  ignore_errors: yes
+  ignore_errors: true  # noqa ignore-errors
   ignore_unreachable: yes
   when: need_bootstrap.rc != 0