Replace "replicas" option (CI tests) removed in latest k8s versions (#6068)

tests/testcases/030_check-network.yml

@@ -18,8 +18,11 @@
   - name: Create test namespace
     shell: "{{ bin_dir }}/kubectl create namespace test"
 
-  - name: Run a replica controller composed of 2 pods in test ns
-    shell: "{{ bin_dir }}/kubectl run test --image={{ test_image_repo }}:{{ test_image_tag }} --namespace test --replicas=2 --command -- tail -f /dev/null"
+  - name: Run 2 busybox pods in test ns
+    shell: "{{ bin_dir }}/kubectl run {{ item }} --image={{ test_image_repo }}:{{ test_image_tag }} --namespace test --command -- tail -f /dev/null"
+    loop:
+    - busybox1
+    - busybox2
 
   - import_role:
       name: cluster-dump