Fix ensure ping package error in fedora CoreOS & Flatcar (#9370)

* fix-ensure-package-in-coreos

* clean blank line

roles/kubernetes/preinstall/tasks/0020-verify-settings.yml

@@ -113,6 +113,8 @@
     - access_ip is defined
     - not ignore_assert_errors
     - ping_access_ip
+    - not is_fedora_coreos
+    - not ansible_os_family in ["Flatcar", "Flatcar Container Linux by Kinvolk"]
 
 - name: Stop if access_ip is not pingable
   command: ping -c1 {{ access_ip }}