CI: more readable loop

Avoids putting whole pod spec in loop label

tests/testcases/030_check-network.yml

@@ -107,6 +107,8 @@
     with_nested:
     - "{{ pods }}"
     - "{{ pods }}"
+    loop_control:
+      label: "{{ item[0].metadata.name + ' --> ' + item[1].metadata.name }}"
   rescue:
   - name: List pods cluster-wide
     command: "{{ bin_dir }}/kubectl get pods --all-namespaces -owide"