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

tests/cloud_playbooks/roles/packet-ci/tasks/create-vms.yml

@@ -12,11 +12,13 @@
   file:
     path: "/tmp/{{ test_name }}"
     state: directory
+    mode: 0755
 
 - name: Template vm files for CI job
   template:
     src: "vm.yml.j2"
     dest: "/tmp/{{ test_name }}/instance-{{ vm_id }}.yml"
+    mode: 0644
   loop: "{{ range(1, vm_count|int + 1, 1) | list }}"
   loop_control:
     index_var: vm_id
@@ -47,5 +49,6 @@
   template:
     src: "inventory.j2"
     dest: "{{ inventory_path }}"
+    mode: 0644
   vars:
     vms: "{{ vm_ips }}"