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/create-gce.yml

@@ -28,7 +28,7 @@
           {%- endif -%}
 
     - name: Create gce instances
-      gce:
+      google.cloud.gcp_compute_instance:
         instance_names: "{{ instance_names }}"
         machine_type: "{{ cloud_machine_type }}"
         image: "{{ cloud_image | default(omit) }}"
@@ -53,17 +53,20 @@
       template:
         src: ../templates/inventory-gce.j2
         dest: "{{ inventory_path }}"
+        mode: 0644
 
     - name: Make group_vars directory
       file:
         path: "{{ inventory_path|dirname }}/group_vars"
         state: directory
+        mode: 0755
       when: mode in ['scale', 'separate-scale', 'ha-scale']
 
     - name: Template fake hosts group vars  # noqa 404 CI templates are not in role_path
       template:
         src: ../templates/fake_hosts.yml.j2
         dest: "{{ inventory_path|dirname }}/group_vars/fake_hosts.yml"
+        mode: 0644
       when: mode in ['scale', 'separate-scale', 'ha-scale']
 
     - name: Delete group_vars directory