upgrade k8s vers, and add a script for future upgrades

tests/testcases/020_check-create-pod.yml

@@ -8,6 +8,6 @@
   - name: Pods are running
     shell: "/usr/local/bin/kubectl get pods --no-headers -o json"
     register: run_pods_log
-    until: (run_pods_log.stdout | from_json)['items'] | map(attribute = 'status.phase') | join(',') == "Running,Running"
+    until: [ '(run_pods_log.stdout | from_json)["items"] | map(attribute = "status.phase") | join(",") == "Running,Running"' ]
     retries: 24
     delay: 5

tests/testcases/030_check-network.yml

@@ -14,7 +14,7 @@
   - name: Check pods IP are in correct network
     assert:
       that: item | ipaddr(kube_pods_subnet)
-    with_items: pod_ips
+    with_items: "{{pod_ips}}"
 
 
   - name: Ping between pods is working