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/testcases/040_check-network-adv.yml

@@ -26,7 +26,7 @@
         bin_dir: "/usr/local/bin"
       when: not ansible_os_family in ["Flatcar Container Linux by Kinvolk"]
 
-    - import_role:
+    - import_role:  # noqa unnamed-task
         name: cluster-dump
 
     - name: Wait for netchecker server
@@ -60,7 +60,7 @@
         - netchecker-agent-hostnet
       when: not nca_pod is success
 
-    - debug:
+    - debug:  # noqa unnamed-task
         var: nca_pod.stdout_lines
       failed_when: not nca_pod is success
       when: inventory_hostname == groups['kube_control_plane'][0]
@@ -80,7 +80,7 @@
       failed_when: false
       no_log: true
 
-    - debug:
+    - debug:  # noqa unnamed-task
         var: agents.content | from_json
       failed_when: not agents is success and not agents.content=='{}'
       run_once: true
@@ -106,7 +106,7 @@
       when:
         - agents.content != '{}'
 
-    - debug:
+    - debug:  # noqa unnamed-task
         var: ncs_pod
       run_once: true
       when: not result is success
@@ -131,7 +131,7 @@
         - calico-node
         - cilium
 
-    - debug:
+    - debug:  # noqa unnamed-task
         var: result.content | from_json
       failed_when: not result is success
       run_once: true
@@ -140,14 +140,14 @@
         - result.content
         - result.content[0] == '{'
 
-    - debug:
+    - debug:  # noqa unnamed-task
         var: result
       failed_when: not result is success
       run_once: true
       when:
         - not agents.content == '{}'
 
-    - debug:
+    - debug:  # noqa unnamed-task
         msg: "Cannot get reports from agents, consider as PASSING"
       run_once: true
       when: