test: Split the task for checking routes and DNS

Signed-off-by: Wen Liang <[email protected]>

tests/tasks/check_network_dns.yml

@@ -3,20 +3,27 @@
 # This is typically used after cleanup, to verify that cleanup
 # worked and left networking in the default state - sort of like
 # a post-condition, or pre-condition for subsequent tests
-- name: Verify DNS and ping still work
+- name: Check routes and DNS
   shell: |
     set -euo pipefail
     echo IP
     ip a
     echo IP ROUTE
     ip route
+    echo IP -6 ROUTE
+    ip -6 route
     echo RESOLV
     if [ -f /etc/resolv.conf ]; then
       cat /etc/resolv.conf
     else
       echo NO /etc/resolv.conf
-      ls -alrtF /etc/resolv.* || :
+      ls -alrtF /etc/resolv.* || :_
     fi
+  changed_when: false
+
+- name: Verify DNS and ping still work
+  shell: |
+    set -euo pipefail
     echo CHECK DNS AND CONNECTIVITY
     for host in mirrors.fedoraproject.org mirrors.centos.org; do
       if ! getent hosts "$host"; then