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/kubernetes/preinstall/tasks/0050-create_directories.yml

@@ -4,6 +4,7 @@
     path: "{{ item }}"
     state: directory
     owner: kube
+    mode: 0755
   when: inventory_hostname in groups['k8s_cluster']
   become: true
   tags:
@@ -28,6 +29,7 @@
     path: "{{ item }}"
     state: directory
     owner: root
+    mode: 0755
   when: inventory_hostname in groups['k8s_cluster']
   become: true
   tags:
@@ -59,6 +61,7 @@
     src: "{{ kube_cert_dir }}"
     dest: "{{ kube_cert_compat_dir }}"
     state: link
+    mode: 0755
   when:
     - inventory_hostname in groups['k8s_cluster']
     - kube_cert_dir != kube_cert_compat_dir
@@ -69,6 +72,7 @@
     path: "{{ item }}"
     state: directory
     owner: kube
+    mode: 0755
   with_items:
     - "/etc/cni/net.d"
     - "/opt/cni/bin"