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/delete-gce.yml

@@ -20,7 +20,7 @@
           {%- endif -%}
 
     - name: stop gce instances
-      gce:
+      google.cloud.gcp_compute_instance:
         instance_names: "{{ instance_names }}"
         image: "{{ cloud_image | default(omit) }}"
         service_account_email: "{{ gce_service_account_email }}"
@@ -34,7 +34,7 @@
       register: gce
 
     - name: delete gce instances
-      gce:
+      google.cloud.gcp_compute_instance:
         instance_names: "{{ instance_names }}"
         image: "{{ cloud_image | default(omit) }}"
         service_account_email: "{{ gce_service_account_email }}"